International Conference on Quantum Physics and Nuclear Engineering March 14-16, 2016 London, UK

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Biography:

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Biography:

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Biography:

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Biography:

Yukio Tomozawa obtained DSc in 1961 from Tokyo University. He was Assistant at Tokyo University (1956) and at Tokyo University of Education (1957-1959) - Member at the Institute for Advanced Study, Princeton, NJ (1964-1966). He was Assistant Professor, Associate Professor, Professor and Emeritus Professor at the University of Michigan, USA. He found that the Schwarzschild metric does not fit the data of time delay experiment in the field of general relativity. He has introduced a physical metric which fits the data. It was constructed with the constraint that the speed of light on the spherical direction is unchanged from that in vacuum. This modification changes the way we understand the nature of gravity drastically. In particular, the nature of compact objects, neutron stars and black holes, is very different from that described by the Schwarzschild metric. It also explains the dark energy, supernova explosion and high energy cosmic ray emission from AGN (Active Galactic Nuclei), massive black holes.

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The author published a proposal in 1985 that suggested cosmic rays are emitted from AGN (Active Galactic Nuclei) or massive black holes. In that proposal, the knee energy in the cosmic ray energy spectrum is the interface between the radiation-dominated expansion rate and the matter-dominated expansion rate for an expanding heat bath. As such, it requires the existence of a particle of mass at 3 PeV, the knee energy value. Assuming that this provides a mass scale for new physics, one can compute the mass of the dark matter particle as the lowest mass state of the new physics. Choosing a supersymmetric theory which provides a large mass ratio, one can predict the dark matter particle mass of 8.1 TeV. The analysis of a recent HESS data shows a gamma ray spectrum that peaks at 7.6±0.1 TeV. The agreement between the theoretical prediction and the observational data suggests the search for the other predicted particles with the mass of 26.8 TeV, 78.0 TeV and 3 PeV.

Biography:

Labonté Laurent studied in the University of Limoges (France) where he received a Master's degree in "Optical and High Frequency Telecommunication" (University of Limoges, France). He obtained the PhD degree in Physics in 2005 on both experimental and numerical study of microstructured fiber for non-linear optics and astronomy. From 2005 to 2006, he was an Assistant Professor. In 2006, he joined the group “Quantum Information with Light & Matter” of the Laboratory of Condensed Matter Physics (LPMC), as an Associate Professor of the University of Nice Sophia Antipolis. His research activities focus on generating, distributing and manipulating quantum information at telecom wavelength.

Abstract:

Integrated quantum photonics has already proven its suitability for high-performance photon-pair source realizations and basic quantum state simulation. Among all physical technological platforms (lithium niobate, KTP, III/V semiconductors), silicon photonics stands as a promising avenue for developing cost-effective quantum circuits, with the potential for on-chip signal processing. Thanks to the possibility of integrating electronics and photonics in a full monolithic fashion. Notably, integrated ring cavities already enable producing entangled photons, thanks to enhanced third-order nonlinear processes. In this talk, we report the generation of entangled photon pairs in micro-ring cavity based on silicon-on-insulator structure (SOI), in energy-time format, which is widely suited for the fiber based quantum key distribution (QKD) because of its robustness against polarization mode dispersion and disturbance. Furthermore, since this on-chip quantum entangled photons pair source is fully compatible with telecom components, it offers a path toward quantum photonic circuits for the next QKD real-world system.

Biography:

Natalia Korolkova has completed her PhD in Theoretical Quantum Optics in 1996 from Moscow State University. During 1996-1997, she was a Post-doctoral Researcher at the Palacky University in Olomouc, Czech Republic, in Non-Classical Light and Quantum Cryptography. In 1997, she joined the University of Erlangen-Nuernberg, Germany, as a Humboldt Fellow working on quantum correlations of bright optical beams and fiber solitons. During 1999-2003, she led the Quantum Information group at the University of Erlangen. Since September 2003, she is Lecturer at the School of Physics and Astronomy, University of St. Andrews, UK. She has published over 70 research papers and book chapters.

Abstract:

A beamsplitter (BS) is frequently used to generate entangled continuous variable states, if at least one of the inputs is a quantum squeezed state. Interestingly, for mixed quantum states, a BS can create entanglement even from two input modes none of which exhibit any local squeezing, provided that they are correlated in a tailored way. These correlations are quantified by Gaussian quantum discord. We demonstrate that such discordant correlations and BS serve as a resource using three protocols: 1) Entanglement distribution by separable ancilla. Here, two modes A and B and the ancilla C are initially in a three-partite fully separable state. C interference on a BS first with A and then with B, consequently A and B become entangled. C remains separable throughout the protocol. The initial state ABC is separable but discordant, i.e., all three modes are correlated in a particular fashion. 2) Recovery of entanglement from the noise-affected squeezed states via interference with a correlated ``environmental’’ mode. 3) Generation of a three-partite entangled state by splitting on a BS a thermal state correlated with a vacuum mode. The created entanglement does not occur between the output modes of the BS but instead it emerges between one output mode and the remaining two modes taken together. This phenomenon is a key element for some of the above protocols, and for entanglement sharing. We will discuss in detail discordant states involved and unveil the seemingly counterintuitive emergence of entanglement in these protocols.

Biography:

David Eimerl has an MA from Oxford University and obtained a PhD from Northwestern University in 1973. He became a program leader and chief scientist at the Lawrence Livermore National Laboratory in the Laser/ICF Program. In 2000, he founded EIMEX, providing contract services in lasers, optics, lasers in medicine, patent prosecution and custom high performance computer codes. He has published more than 140 papers in refereed journals and has several patents.

Abstract:

StarDriver is a class of laser fusion drivers that minimizes laser-plasma instabilities and improves laser-plasma coupling by the use of multi-beam laser architecture with both large system frequency bandwidth and dense, wide k-spectrum. It comprises 5000-25000 individual lasers (beamlets), each delivering nominally 100 joules in pulses of ~3-30 ns at a nominal wavelength of ~355 nm with better than 3-5 diffraction-limited performance. The beamlets are individually relatively narrowband (<1THz) to facilitate maximum laser performance, but the ensemble of beamlets span a wide frequency range. Currently available laser media enable ~ 2% at 355 nm with the possibility of system bandwidths approaching 10% in the future. Each beamlet has 2D SSD. StarDriver provides optimal asymptotic smoothing for hydrodynamic instabilities (0-1%), innovative focusing strategies including zooming, and the large bandwidth enables extremely rapid hydrodynamic smoothing times ~ 30 fs. The distribution of frequencies among the beamlets allows flexibility for fine control of the seeding of the Rayleigh-Taylor instability. The ultra-broad bandwidth combined with the large k-spectrum of the beamlets irradiating the plasma corona may enable complete suppression of the most problematic laser-plasma instabilities such as stimulated Brillouin backscatter, stimulated Raman scatter, cross-beam energy transfer, and the two plasmon decay instability. StarDriver offers potentially superior flexibility in laser drivers for ICF, enabling almost arbitrary sequencing of wavelength, polarization, focus, and fine control of the spatio-temporal properties of the drive in the corona. The highly modular strategy of StarDriver should enable an attractive development pathway as well as maximizing overall system efficiency.

Biography:

Almut Beige completed her PhD in 1998 at the University of Goettingen in Germany. She is the Head of the Theoretcial Physics Group in the School of Physics and Astronomy at the University of Leeds, which she joined after working at Imperial College London and the Max-Planck Institute for Quantum Optics in Garching in Germany. She published 80 scientific papers, has an H-index of 23 and more than 2000 citations listed on ISI Web of Science. She currently serves on the Editorial Board of Journal of Modern Optics and European Physics Journal D.

Abstract:

Sonoluminescence is the intriguing phenomenon of energy concentration from an oscillating pres- sure field into a brief pulse of light via the actions of a bubble filled with atomic species. Since its discovery, there have been many theories on what mechanisms must be at work. The phenomenon attracted the interests of scientists from a wide range of disciplines, including physics, chemistry and engineering. In this paper, we develop a quantum optical model to analyse the dynamics of the atoms during the bubble collapse phase. Our model uses ideas of analogous work on cavity-mediated collective laser cooling of an atomic gas to very low temperatures and predicts many aspects of actual sonoluminescence experiments correctly. For example, we identify a mechanism responsible for the sudden emission of light during each bubble collapse phase. Moreover, our model might explain why certain atomic species in sonoluminescing bubbles become hotter than what one would expect from thermodynamic heating by rapid compression. In the long-term, our work might help to further increase the temperature of sonoluminescing bubbles for applications in sonochemistry, medicine, and the study of small volume plasmas.

Biography:

Jianxin Chen has completed his PhD from the Graduate School, Chinese Academy of Sciences. He has been with Shanghai Institute of Metallurgy, Chinese Academy of Sciences; Swiss Federal Institute of Technology at Laussane; Bell Laboratories, Lucent Technologies; and Princeton University. He is now a Professor of Shanghai Institute of Technical Physics, Chinese Academy of Sciences. He has authored and co-authored more than 80 peer-reviewed journal papers. His current research interests are quantum structured materials for optoelectronic devices.

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I will report our recent works on InAs-based superlattice photodiodes. The InAs/GaSb superlattice materials were conventionally grown on GaSb substrates and have been achieved excellent successes. However since the lattice constant of InAs is smaller than that of GaSb, GaSb-based superlattice structures are highly strained. The longer the cutoff wavelength, the bigger the strain is. This issue can be eliminated if the superlattice structures are grown on InAs substrates. Moreover, the growth temperature of the superlattice materials on InAs substrates can be significantly increased, which helps to improve the superlattice’s electrical properties, such as minority carrier lifetime, which is a bottleneck for superlattice photo-detector’s performances. InAs/GaSb superlattices on InAs substrates with sharp X-ray diffraction peaks have been obtained for the first time, indicating high crystalline quality of the material. Superlattice structures with different InAs thickness in each period was grown and examined. The results show that the lattice mismatch of the superlattices to the InAs substrates is not sensitive to the InAs thickness. Cutoff wavelength can be tuned from 6 μm to 12 μm by varying the InAs layer thickness from 14 MLs to 26 MLs. Optical responses and quantum efficiency are measured and changes linearly with the absorption thickness. P-I-N detectors based on the InAs-based superlattice materials also shown excellent electrical performances, which will be presented and discussed in detail in the talk.

Biography:

Binayak S Choudhury is Full Professor of the Department of Mathematics, Indian Institute of Engineering Science and Technology, Shibpur, India since 2003. He has supervised 13 PhD students and published more than 175 research articles in journals in several areas of Pure Mathematics, Applied Mathematics and Theoretical Physics. He has delivered lectures in many institutes and universities across the world. His works in Theoretical Physics are in Quantum Physics and Cosmology.

Abstract:

Quantum entanglement is considered as the most precious resource of Quantum Technology. Originally, the concept appeared in the famous EPR paper in 1935 in which entanglement between two parties was defined. It was only during the last decade of the twentieth century that the power of entanglement was discovered. In recent years, studies on entanglement attracted much attention due to its uses in the absolutely safe information transmission through Quantum Communication Protocols like Quantum Teleportation, Quantum Key Distribution, Quantum Secret Sharing, etc. Multipartite entanglement was considered and put to use at a later point of time. The quantification of entanglement had become necessary for which measures of entanglement have developed. In most of the cases, maximally entangled states are used, especially in Communication Protocols, although there are some reports of utilizing non-maximally entangled states as well. Thus, there is a need to increase the amount of entanglement, that is, to find the ways of creating more entanglement starting from a state which is initially less entangled. For this purpose Entanglement Concentration Protocols are proposed. Particularly, our discussion is on the protocols for entanglement concentration of multipartite quantum states, that is, quantum states which are shared by more than two parties.

Biography:

Nir Bar-Gill is an Assistant Professor in the departments of Applied Physics and Physics at the Hebrew University in Jerusalem, Israel. He received his PhD in 2010 from the Weizmann Institute of Science in Israel, following which he spent 3 years as a Post-doctoral fellow at Harvard University, USA. His research focuses on NV centers in diamond, and in particular their relation to quantum information processing, quantum simulation and sensing. He has received several awards, including the Harvard Post-doctoral Award for career development and the Minerva ARCHES award.

Abstract:

Nitrogen-Vacancy (NV) color centers in diamond provide a unique nanoscale quantum spin system embedded in a solid-state structure. As such they are well suited for studies in a wide variety of fields, with emerging applications ranging from quantum information processing to magnetic field sensing and nano-MRI (Magnetic Resonance Imaging). Importantly, NVs possess unique optical transitions which allow for optical initialization and readout of their quantum spin state. In this talk I will introduce the field of NV centers, and describe our research into understanding and controlling these systems, with the goal of enabling fundamental research and future applications. I will present the techniques used for manipulation of the NV centers, and for enhancing their quantum coherence lifetime. Specifically, I will describe our recent work on extending the coherence time of arbitrary quantum states, and on spectrally characterizing the noise which limits coherence in shallow NVs. I will then demonstrate how these approaches can be used for magnetic field sensing and nanoscale NMR (Nuclear Magnetic Resonance) and MRI.

Biography:

Manuel García Méndez got his PhD at the CICESE-UNAM program in Ensenada, México in 2000. Then, he did a Post-doc staying at the Physics Department, University of Manchester in 2000-2001. From 2001 up to date, he has been a Titular Researcher at the CICFIM in Monterrey, NL México, in which he heads the Thin Film Laboratory.

Abstract:

Electronic, structural and photoluminescence properties of ZnO and Ce-doped ZnO thin films deposited on glass substrates by RF reactive-magnetron sputtering, and post annealed at 300C into an oxygen atmosphere, were investigated using X-ray diffraction (XRD), UV-Visible spectroscopy, XPS and PL measurements. Both films crystalized in wurzite structure with lattice parameters very similar in value to the stress-free standard. Transmittance of both films was high, of about 90% at the visible wavelength region (400-750 nm), with a band gap of Eg=3.23 eV and Eg=3.27 eV for pure and Ce-doped films respectively. The absorption edge of the doped film was shifted to the blue because of the Burstein-Moss effect. XPS spectra showed the coexistence of Ce3+ and Ce4+ ions in a proportion of about 70%:30% into the host ZnO lattice. Both type of ions induce extra electron states that allows multi-emission peaks at the blue-green region. Rearrangement of electronic levels because of added Ce into the ZnO matrix is discussed. Such films with blue-green luminescent properties are promising materials for potential applications in optoelectronic devices.

Biography:

O.Hirota has received his PhD at 1979 from Tokyo Institute of Technology (Japan). He is director of the Quantum ICT Research Institute of Tamagawa University, and one of pioneer of quantum information science. He has established in 1990 International Conference on Quantum Communication, Measurement and Computing (QCMC). Number of his published papers in particular on quantum state discrimination theory and entangled coherent state are more than 100.

Abstract:

Non-orthogonal quantum states in infinite dimensional space are playing a special role in foundation of quantum mechanics. The Gaussian state is a typical example of such a state that was considered at beginning of history of quantum theory. The explicit importance of Gaussian quantum states such as coherent state was certified by R.Glauber, E.C.G.Sudarshan, et al in quantum optics for understanding a nature of laser. More progress has been given by H.P.Yuen who discovered a special properties of generalized coherent state known as squeezed state, and a method to verify them experimentally. Then current interest goes to entanglement of non-orthogonal quantum state such as two-mode squeezed state and quasi-Bell entangled coherent state. On the other hand, a problem of discrimination of non-orthogonal quantum states through quantum measurement that was pioneered by C.W.Helstrom is also a foundation of quantum physics. Its basic criteria are Bayes, Neyman-Peason, and Minimax which play different roles. In this talk, I present a historical survey of importance of non-orthogonal quantum state, and progress of quantum state discrimination. Also I introduce potential applications of theoretical achievements on non-orthogonal quantum state such as Quantum Methodology and Quantum Enigma Cipher based on recent experimental progress.

Biography:

Alexander Kubanek has completed his PhD at the age of 30 years from Max-Planck Institute of Quantum Optics and Technical University Munich (Germany). He spend 4 years as PostDoctoral Fellow / Research Associate at Physics Department of Harvard University. Since 2014 he is Carl-Zeiss Professor at Quantum Optics Institute of Ulm University. He was fellow of Bavarian Network of Excellence and International PhD-Programm Quantum Computing, Communication and Control and Feodor Lynen Fellow of Alexander von Humboldt Foundation. He has publication papers in Nature, Nature Physics and Physical Review Letters.

Abstract:

Implementing efficient, highly controllable light-matter interfaces is essential to realizing the goal of solid-state quantum networks. The nitrogen-vacancy (NV) center in diamond is a promising candidate for such interfaces due to favorable properties, such as long coherence times or single shot readout capabilities. Creating optical links between remote NV centers was an outstanding challenge until the recent demonstration of photon-mediated spin-spin entanglement between NV centers separated by three meters. I will present robust control of two remote NV centers demonstrating Hong-Ou-Mandel interference to verify the indistinguishability of photons produced by remote NV centers. The NV center’s application as quantum register depends on the ability to resonantly drive closed cycling transitions and closed lambda transitions with high fidelity. The fidelity can be degraded by phonon-induced mixing within the excited state manifold, which can provide unwanted non-radiative decay channels. I will present detailed investigation of phonon-induced mixing mechanism. Besides the importance to control phonon processes for applications of the NV center in Quantum Information the NV center’s broad range of applications as sensors relies on the ability to initialize and readout the electronic state with off-resonant laser light. Both, initialization and read out, rely on an inter-system crossing (ISC) process into a metastable state, a phonon-assisted shelving process that has not been fully explained. We have measured the ISC rate for different excited states and developed a model that unifies the phonon-induced mixing and ISC mechanisms.

Biography:

Dr. Laurent Labonté studied in the University of Limoges (FRANCE) where he received a Master's degree in "optical and high frequency telecommunication" (University of Limoges, France). He obtained the PhD degree in Physics in 2005 on both experimental and numerical study of microstructured fiber for non-linear optics and astronomy. From 2005 to 2006, he was an assistant professor. In 2006, he joined the group “Quantum Information with Light & Matter” of the Laboratory of condensed matter physics (LPMC), as an associate professor of the University of Nice - Sophia Antipolis. His research activities focus on generating, distributing and manipulating quantum information at telecom wavelength.

Abstract:

Integrated quantum photonics has already proven its suitability for high-performance photon-pair source realizations and basic quantum state simulation. Among all physical technological platforms (lithium niobate, KTP, III/V semiconductors) silicon photonics stands as a promising avenue for developing cost- effective quantum circuits, with the potential for on-chip signal processing thanks to the possibility of integrating electronics and photonics in a full monolithic fashion. Notably, integrated ring cavities already enable producing entangled photons thanks to enhanced third-order nonlinear processes. In this talk, we report the generation of entangled photon pairs in micro-ring cavity based on silicon-on-insulator structure (SOI), in energy-time format, which is widely suited for the fiber based quantum key distribution (QKD) because of its robustness against polarization mode dispersion and disturbance. Furthermore, since this on-chip quantum entangled photons pair source is fully compatible with telecom components, it offers a path toward quantum photonic circuits for the next QKD real-world system.

Biography:

David Eimerl has an MA from Oxford University and obtained a PhD from Northwestern University in 1973. He became a program leader and chief scientist at the Lawrence Livermore National Laboratory in the Laser/ICF Program. In 2000, he founded EIMEX, providing contract services in lasers, optics, lasers in medicine, patent prosecution and custom high performance computer codes. He has published more than 140 papers in refereed journals and has several patents.

Abstract:

StarDriver is a class of laser fusion drivers that minimizes laser-plasma instabilities and improves laser-plasma coupling by the use of multi-beam laser architecture with both large system frequency bandwidth and dense, wide k-spectrum. It comprises 5000-25000 individual lasers (beamlets), each delivering nominally 100 joules in pulses of ~3-30 ns at a nominal wavelength of ~355 nm with better than 3-5 diffraction-limited performance. The beamlets are individually relatively narrowband (<1THz) to facilitate maximum laser performance, but the ensemble of beamlets span a wide frequency range. Currently available laser media enable ~ 2% at 355 nm with the possibility of system bandwidths approaching 10% in the future. Each beamlet has 2D SSD. StarDriver provides optimal asymptotic smoothing for hydrodynamic instabilities (0-1%), innovative focusing strategies including zooming, and the large bandwidth enables extremely rapid hydrodynamic smoothing times ~ 30 fs. The distribution of frequencies among the beamlets allows flexibility for fine control of the seeding of the Rayleigh-Taylor instability. The ultra-broad bandwidth combined with the large k-spectrum of the beamlets irradiating the plasma corona may enable complete suppression of the most problematic laser-plasma instabilities such as stimulated Brillouin backscatter, stimulated Raman scatter, cross-beam energy transfer, and the two plasmon decay instability. StarDriver offers potentially superior flexibility in laser drivers for ICF, enabling almost arbitrary sequencing of wavelength, polarization, focus, and fine control of the spatio-temporal properties of the drive in the corona. The highly modular strategy of StarDriver should enable an attractive development pathway as well as maximizing overall system efficiency.

Biography:

Nir Bar-Gill is an Assistant Professor in the departments of Applied Physics and Physics at the Hebrew University in Jerusalem, Israel. He received his PhD in 2010 from the Weizmann Institute of Science in Israel, following which he spent 3 years as a Post-doctoral fellow at Harvard University, USA. His research focuses on NV centers in diamond, and in particular their relation to quantum information processing, quantum simulation and sensing. He has received several awards, including the Harvard Post-doctoral Award for career development and the Minerva ARCHES award.

Abstract:

Nitrogen-Vacancy (NV) color centers in diamond provide a unique nanoscale quantum spin system embedded in a solid-state structure. As such they are well suited for studies in a wide variety of fields, with emerging applications ranging from quantum information processing to magnetic field sensing and nano-MRI (Magnetic Resonance Imaging). Importantly, NVs possess unique optical transitions which allow for optical initialization and readout of their quantum spin state. In this talk I will introduce the field of NV centers, and describe our research into understanding and controlling these systems, with the goal of enabling fundamental research and future applications. I will present the techniques used for manipulation of the NV centers, and for enhancing their quantum coherence lifetime. Specifically, I will describe our recent work on extending the coherence time of arbitrary quantum states, and on spectrally characterizing the noise which limits coherence in shallow NVs. I will then demonstrate how these approaches can be used for magnetic field sensing and nanoscale NMR (Nuclear Magnetic Resonance) and MRI.

Biography:

N Y Joly is an Associate Professor at the University of Nüremberg-Erlangen, where he works on photonic crystal fibers in close collaboration with the division of Prof. Philip Russell at the Max-Planck Institute for the Science of Light. His domain of research includes dynamics of fs-pulsed ring cavity as well as nonlinear optics in PCF. In particular he is very interesting in the nonlinear generation of new frequencies like supercontinuum generation.

Abstract:

Photonic crystal fibers (PCF) offer an important platform for 3-based nonlinear optics owing to the possibility to fully tailor their dispersion properties or modify the number of guided modes. We present here two ways to use these fibers in order to generate non-classical states of light, which are important tools for quantum technologies. First, we show the generation of bright correlated twin beams, based on modulation instability in a kagomé-lattice hollow-core PCF filled with argon at high pressure. In this experiment, we used 300 fs pump pulses from a Ti:Sa regenerative system (=800 nm) to generate modulation-instability sidebands. We then observed twin-beam squeezing up to 35% below the shot-noise level. This very bright source is spatially single mode and can exhibit only a few temporal modes (<5). Second, we introduce a new design of micro structured fiber for the generation ofthe photon-triplet state through a direct decay of pump photons. Similarly to the third harmonic generation, the phase matching is usually not satisfied for the fundamental spatial modes due to chromatic dispersion. The spatial overlap is therefore small and the efficiency of the process is consequently poor. Here we use a hybrid solid-core PCF, in which total internal reflection occurs at down-converted wavelengths while an all-solid band gap governs the guidance mechanism at the pump wavelength. The overall dispersion is strongly influenced by these two mechanisms. Preliminary experiments on third harmonic generation confirm that the phase-matching between fundamental modes is indeed possible with this structure.

Biography:

Alexander G. Ramm is a Instructor, Leningrad Institute of Precision Mechanics and Optics, 1962-63, Assistant Professor, Leningrad Institute of Precision Mechanics and Optics, 1964-65, Associate Professor, Leningrad Institute of Precision Mechanics and Optics, 1965-78, Visiting Professor and Research Scientist, University of Michigan, 1979-81, Professor, Kansas State University, 1981- Present. I am Visiting Professor of University of Vienna, Goeteborg, Stuttgart, Bonn, Heidelberg, Manchester, London, Uppsala, Royal Inst. of Technology, Stockholm, Acad. Sinica, Taipei, Indian Institute of Science Bangalore, Concordia Univ.,Montreal, Institute of Mathematics Ac.Sci USSR, Novosibirsk, Univ of Stockholm, Technion, Israel, Univ. of Cagliari and Milan, Wright Patterson Air Force Base, Univ. of Madrid, Univ. of Grenoble, Politecnico Milan, Univ of Giessen, Univ. of Singapore, Tokyo Metropolitan Univ., Univ. of Palermo, Hebrew Univ., IMPA-Brazil, LMA/CNRS-France, KAIST, Univ. of Leicester, IMPAN.

Abstract:

Many-body wave scattering problems are solved asymptotically, as the size a of the particles tends to zero and the number of the particles tends to innity. Acoustic, quantum-mechanical, and electromagnetic wave scattering by many smallparticles is studied.This theory allows one to give a recipe for creating materials with a desiredrefraction coecient. One can create material with negative refraction, that is, the group velocity in this material is directed opposite to the phase velocity. One can create material with some desired wave-focusing properties. For ex-ample, one can create a new material which scatters plane wave mostly in a fixed given solid angle.

Biography:

Vladimir V Rumyantsev is Professor in Nanophysics Department at Donetsk National University (DonNU) and Head of Physics Technology Subdivision at A A Galkin Donetsk Institute for Physics and Engineering (DonPhTI). He received PhD in Physics (1988) from DonNU and Doctor of Science in Solid State Physics (2007) from DonPhTI. He has published more than 200 scientific publications. He is Group Leader of international project in the framework of the European program FP7-PEOPLE-2013-IRSES (2013-2016).

Abstract:

The important features of photonic band-gap structures under discussion are connected with ‘slow’ light, which is one of the promising fundamental physical phenomena that can be explored in the design of various quantum optical storage devices. In particular, the effective reduction of the group velocity demonstrated in the associated optical waveguide resonators. Key role in reducing the group velocity in these systems is played by so-called light and dark polaritons, which are linear superposition of photon states of the external electromagnetic field and the macroscopic (coherent) perturbations of two-level atomic medium. Based on the representations of the ideal photonic structures, the non-ideal systems of this class - polaritonic crystal, which is a set of spatially ordered cavities containing atomic clusters, is considered. Moreover, the spatial distribution of cavities (resonators) is translation invariant, and the atomic subsystem has randomly distributed defects: impurity atomic clusters (quantum dots) or a vacancies. Numerical modeling of dependence of the dispersion of polaritons in this imperfect lattice of associated micro-resonators on impurity concentration is completed. Using the virtual crystal approximation the analytical expressions for polaritonic frequencies, effective mass and group velocities, as a function of corresponding quantum dots and vacancies concentrations, is obtained. It turned out that even with a small number of vacancies in the lattice (one position for a thousand resonators) weight polaritons increases by three orders of magnitude. These results enable to extend the possibility of creating a new class of functional materials - polaritonic crystal systems.

Biography:

Norio Kawakami has completed his PhD from Osaka University (Japan). His research concerns Theory of Condensed Matter Physics with particular emphasis on many-body problems where interactions between the constituent particles, such as electrons in solids, are very strong and thus give rise to novel quantum phenomena.

Abstract:

Photo-induced quantum phenomena have attracted much attention recently. Here, we address the following quantum phase transitions induced by external laser fields in cold fermions in optical lattices. Recently, concepts of topological phases of matter are extended to non-equilibrium systems, especially periodically driven systems. We construct a model which shows non-equilibrium topological phase transitions using a simple phenomenon in cold-atomic systems. We show that the celebrated Rabi oscillation has the possibility to tune the band structure in fermionic optical lattices and thereby drives non-equilibrium topological phase transitions. If time allows, we also address a possible realization of a photo-induced Kondo effect induced for cold fermions in optical lattices. Using a model for cold alkaline-earth atoms driven by optical coupling, we demonstrate that photo-induced Kondo effect overcomes the heating effect, and thus realizes orbital-spin entangled states leading to heavy-fermion liquids.

Biography:

Ian O’Driscoll obtained his PhD at UCC, Ireland in 2008, where he studied the carrier dynamics of InAs quantum dots. He then worked at Cardiff University, UK, as a Research Associate until 2012, where he investigated the physics of quantum dot laser materials and the consequences of carrier localization on device behavior. Since 2013, he works at the Tyndall National Institute, Ireland, where he is a recipient of the Starting Investigator Research Grant funded by Science Foundation Ireland. He has published over 30 papers in reputed journals and currently serves as Guest Editor for a special issue in MDPI Photonics.

Abstract:

This work uses semiconductor quantum dots, which are nanoscale inorganic materials, in order to achieve extremely short optical light pulses. Such pulses find use in high bit rate optical communications, wave division multiplexing, microscopy, multi-photon imaging and the generation of terahertz signal sources. Passively mode locked ultra-short pulses are created using an absorber section within a quantum dot lasing cavity, and the repetition rate, or time between successive pulses, is controlled by the length of the cavity. The work confirms the merits of random population for the generation of ultra-short pulses. When the quantum dots are randomly populated, they are independently occupied, which allows access to the entire gain spectrum. Sub pico-second pulse-widths were achieved using these methods, without any significant device engineering. A relatively simple method for significantly improving the optical pulse width when the dots are randomly populated will also be highlighted. These techniques can be applied to any quantum dot material.

Biography:

Fabian Hartmann studied Physics at the University of Würzburg, Germany, and has completed his PhD from “Technische Physik” (Chair of Applied Physics), University of Würzburg. Currently, he is a post-doctoral research associate in the Nanoelectronics group at “Technische Physik”. His current research interests are noise assisted electron transport phenomena in low-dimensional semiconductor devices and resonant tunneling diode based sensors for infrared light detection applications. He has published more than 15 papers in reputed journals.

Abstract:

The exploitation of excess heat and noise has become a topical and significant branch of research, especially in electronics, where an ongoing trend towards sustainable, energy efficient and autonomous systems can be observed. Such a reuse is mainly possible by utilizing nonlinear systems and phenomena like e.g. stochastic resonance (SR) which enhances weak input signals by coupling to a noise floor. Furthermore, noise can improve the operation of logic gates: logical stochastic resonance (LSR) renders logic gates fault tolerant and reliable when the noise is situated in a suitable range. Both LSR and SR have in common the improvement of functional capabilities by application of noise to a system. Here, we present a Coulomb-coupled quantum dot (QD) device that is capable of generating a current through a QD by rectifying voltage fluctuations applied to the other QD. The magnitude and sign of the rectified current can be switched and controlled by external gates, and using these gates as logic inputs, enables the realization of various Boolean logic gate operations. Dependent on the noise amplitude and the control gate voltage, the device features AND, OR, NAND and NOR gate functionalities which can be switched between by either solely changing the noise magnitude or by a sole variation of the control gate voltage.

Biography:

Waseem Bakr received his PhD from Harvard University in 2011. During his Doctoral thesis, he developed the technique of quantum gas microscopy for imaging atoms with single-site resolution in optical lattices. He used this technique to study quantum phase transitions in optical lattices in Hubbard models and in one-dimensional spin chains. Between 2011 and 2013, he was a Post-doctoral Researcher in Martin Zwierlein’s group at MIT, where he experimentally explored strongly-correlated fermions, including experiments on lower dimensional gases and spin-orbit coupled systems. Since 2013, he has been an Assistant Professor in the Department of Physics at Princeton University.

Abstract:

Strongly interacting Fermi gases of ultracold atoms are a clean and tunable platform for exploring high critical temperature superfluidity. This is particularly interesting because the physics of these gases has a close connection to superconductivity in strongly correlated materials. Early experiments in 3D gases have shed light on the crossover from BCS superfluidity to Bose-Einstein condensation of molecules and on the fate of superfluidity in spin-imbalanced gases. Here we study a strongly interacting spin-imbalanced Fermi gas in two-dimensions, where the low dimensionality enhances correlations and phase fluctuations in the gas. We observe pair condensation in the imbalanced gas and map out the critical polarization at which the condensate vanishes for different interaction strengths. At low temperatures, we observe phase separation between the superfluid and normal gas over a wide range of imbalance. The measurement of the phase diagram of strongly interacting fermions in two dimensions opens the door for a detailed investigation of exotic phases enhanced in two dimensions and in optical lattices like the elusive FFLO phase.

Biography:

Norio Kawakami has completed his PhD from Osaka University (Japan). His research concerns Theory of Condensed Matter Physics with particular emphasis on many-body problems where interactions between the constituent particles, such as electrons in solids, are very strong and thus give rise to novel quantum phenomena.

Abstract:

Photo-induced quantum phenomena have attracted much attention recently. Here, we address the following quantum phase transitions induced by external laser fields in cold fermions in optical lattices. Recently, concepts of topological phases of matter are extended to non-equilibrium systems, especially periodically driven systems. We construct a model which shows non-equilibrium topological phase transitions using a simple phenomenon in cold-atomic systems. We show that the celebrated Rabi oscillation has the possibility to tune the band structure in fermionic optical lattices and thereby drives non-equilibrium topological phase transitions. If time allows, we also address a possible realization of a photo-induced Kondo effect induced for cold fermions in optical lattices. Using a model for cold alkaline-earth atoms driven by optical coupling, we demonstrate that photo-induced Kondo effect overcomes the heating effect, and thus realizes orbital-spin entangled states leading to heavy-fermion liquids.

Biography:

M Zahid Hasan is a Professor of Physics at Princeton University. He obtained his PhD in 2002 from Stanford University, working at SLAC and Brookhaven National Laboratory. He is an Expert in the physics of quantum matter, emergent phenomena in electron systems, and advanced spectroscopic high resolution imaging techniques. His research has focused on quantum Hall-like topological phases, exotic superconductors, quantum phase transitions, and topological quantum matter. He played a pioneering role in the experimental discoveries of bulk topological insulators, helical topological superconductors, Weyl fermion materials and related new forms of quantum matter. A highly-cited Researcher worldwide, he has published more than 120 papers in many reputed journals.

Abstract:

Topological matter can host Dirac, Majorana and Weyl fermions as quasiparticle modes on their boundaries. First, I briefly review the basic theoretical concepts defining insulators and superconductors where topological surface state (Dirac and Majorana) modes are robust only in the presence of a gap (M.Z. Hasan and C.L. Kane; Rev. of Mod. Phys. 82, 3045 (2010)). In these systems topological protection is lost once the gap is closed turning the system into a trivial metal. A Weyl semimetal is the rare exception in this scheme which is a topologically robust metal (semimetal) whose low energy emergent excitations are Weyl fermions. In a Weyl fermion semimetal, the chiralities associated with the Weyl nodes can be understood as topological charges, leading to split monopoles and anti-monopoles of Berry curvature in momentum space. This gives a measure of the topological strength of the system. Due to this topology a Weyl semimetal is expected to exhibit 2D Fermi arc quasiparticles on its surface. These arcs (“fractional” Fermi surfaces) are discontinuous or disjoint segments of a two dimensional Fermi contour, which are terminated onto the projections of the Weyl fermion nodes on the surface (Xu, Belopolski et.al., Science 349, 613 (2015) and Huang, Xu, Belopolski et.al., Nature Commun. 6:7373 (2015)). I show that Fermi arc quasiparticles can only live on the boundary of a 3D crystal which collectively represents the realization of a new state of quantum matter.

Biography:

Yuji Hasegawa has completed his PhD from the University of Tokyo. During and after his study, he spent several years at the Atominstitut der Österreichischen Universitäten, Vienna and became University Assistant at the University of Tokyo. He was a Lise-Meitner Fellow by Austrian Science Fund (FWF) and a PRESTO Fellow by Japan Science and Technology Agency (JST). Now he is Associate Professor at the Vienna University of Technology (TU-Wien). He has published more than 100 papers in reputed journals.

Abstract:

The validity of quantum-mechanical predictions has been confirmed with a high degree of accuracy in a wide range of experiments. Although the statistics of the outcomes of a measuring apparatus have been studied intensively, little has been explored and is known regarding the accessibility of quantum dynamics and the evolutions of a quantum system during measurements. For this sort of fundamental studies of quantum mechanics, interferometric and polarimetric approaches, in particular by the use of neutron’s matter-waves, provide almost ideal experimental circumstances. The former device explicitly exhibits quantum interference between spatially separated beams in a macroscopic scale. In contrast, interference effects between two spin eingenstates are exposed in the latter apparatus. Exploiting both strategies, alternative theories of quantum mechanics, Kochen-Specker theorem and so on are studied. Recently, as a study of quantum dynamics, neutron interferometer experiments are carried out: a new counter-intuitive phenomenon, called quantum Cheshire-cat, is observed. Moreover, extending the first experimental test of the new error-disturbance uncertainty relation by using a modified neutron polarimeter setup, we performed experiments investigating the validity of an extended uncertainty relation for mixed ensemble as well as a new noise-disturbance uncertainty relation in an entropic form. In my talk, I am going to give an overview of matter-wave optical approach to investigations of fundamental aspect of quantum mechanics.

Biography:

Mehdi Nosrati is currently working on waveguide theory as a Ph.D student in university of Alberta.

Abstract:

Maxwell’s equations are the main foundation of current communication technology; however, given certain ambiguities and unknown parameters, they are still incomplete. Magnetic current is apparently the main crucial missing component of these equations. In this talk, we will resolve to revise these equations as well as the conventional definitions of the terms and parameters from the beginning, basing ourselves merely on logical theory to justify all measurements made so far. These revisions will be initiated by modifying Bohr’s Model and the physical differentiations of magnetic and electrical fluxes in order to justify all electromagnetic phenomena under a consistent umbrella. Consequently, we can theoretically present a rational illustration of magnetic current and amend the contradictions and inconsistencies in the current models and theory of electromagnetic waves. Furthermore, a question has been put forward to determine whether we can go beyond Maxwell’s equations. In order to answer this question some rational justifications, confirmed with measurements, will be presented which demonstrate that we can propagate the wave inside a metallic waveguide merely by using a magnetic field and without generating an electrical field.

Biography:

Gabriel Barceló completed Industrial Engineering from ETSII, Madrid, specializing in Energy Techniques in 1964; Physics from UC Madrid in 1968, and PhD in Industrial Engineering in 1973 from ETSII, Madrid. Joining the State Administration like Industrial Engineering at the Service of the Treasury in 1971, he passed on to become Finance and Tax Inspector (1977), Deputy Director of the Data Processing Center of the Ministry of Economy and Finance (1982) and State Finance Inspector in 1984. He was Professor of the UP in Madrid and Consultant. He has written numerous texts and treatises on physics and in the last 30 years has been devoted to research on dynamic systems and rotational dynamics.

Abstract:

We propose new dynamic hypotheses to enhance our understanding of the behaviour of the plasma in the reactor. In doing so, we put forward a profound revision of classical dynamics. After over thirty years studying rotational dynamics, we propose a new theory of dynamic interactions to better interpret nature in rotation. This new theory has been tested experimentally returning positive results, even by third parties. Plasma rotation is an essential factor in the analysis of the turbulent transport of momentum in axisymmetric systems. In magnetic confinement fusion systems, the plasma circulates in the container at a constant movement, which we could define as rotation with respect to its walls. Notwithstanding, it has been shown that the plasma in the reactor can initiate spontaneous circular movement or rotation, without the need for any external dynamic momentum input. The theoretical development of this behaviour is still under study, and the origin of this intrinsic rotation is still unclear. We suggest the exploring of a new type of dynamic confinement based on the Theory of Dynamic Interactions (TDI) and one that is compatible with magnetic confinement. Applying this criterion we are proposing would enable a twin physical-theoretical principle to isolate plasma and try to minimize its turbulence. We suggest that these new dynamic hypotheses, which we hold applicable to particle systems accelerated by rotation, be used in the interpretation and design of fusion reactors. We believe that this proposal could, in addition to magnetic confinement, achieve confinement by simultaneous and compatible dynamic interaction.

Biography:

Ä°smail Hakkı Sarpün has completed his PhD in 2004 from Osmangazi University in EskiÅŸehir, Turkey. He was Visiting Scientist at ICTP in 1994 and 1995. He is Associated Professor at Afyon Kocatepe University and Member of a research team focusing on theoretical nuclear calculations and coordinator of TESNAT International Conference series. He is the Director of the TEFSAM Laboratory.

Abstract:

In fusion reactors, neutron induced radioactivity strongly depends on the irradiated material. So, a proper selection of structural materials will has been limited the radioactive inventory in a fusion reactor. First-wall and blanket components have high radioactivity concentration due to being the most flux-exposed structures. The main objective of fusion structural material research is the development and selection of materials for reactor components with good thermo-mechanical and physical properties, coupled with low-activation characteristics. Double differential light charged particle emission cross section, which is a fundamental data to determine nuclear heating and material damages in structural fusion material research, for some elements target nuclei have been calculated by the TALYS 1.6 nuclear reaction code at 14.8 MeV neutron incident energy and compared with available experimental data in EXFOR library. Direct, compound and pre-equilibrium reaction contribution have been theoretically calculated and dominant contribution has been determined for each emission of proton, deuteron and alpha particle. Penetrating distance and stopping powers also have been calculated for the alphas, deuterons and protons using GEANT4 code and compared each other.

Biography:

Mahmoud Mahdian has completed his PhD from University of Tabriz. He is Associated Professor and Director of a research team focusing on Relativistic quantum entanglement at University of Tabriz. He has published more than 20 papers in reputed journals.

Abstract:

We show that the projections of a Relativistic Spin Operator (RSO) massive spin-½ particle on a world-vector which can be in time-like or null tetrad direction are proportional to the helicity or Bargman-Wigner (BW) qubit, respectively. Here we consider Lorentz transformations of spin-momentum correlation of one massive spin-½ and spin-1 particle states, which have been constructed both in helicity basis. For convenience, instead of using the superposition of momenta we use only two momentum eigenstates (p1 and p2) for particle. Consequently, in 2D momentum subspace we describe the structure of one particle in terms of the two-qubit system. We present a new approach to quantification of relativistic entanglement based on Non-Linear Entanglement Witnesses (NLEWs), which is obtained by a new method of convex optimization. The effect of Lorentz transformation would decrease both the amount and the region of entanglement. We also study quantum correlation dynamics of two relativistic particles which is transmitted through noisy channels. We compare the Geometric Discord (GD) and quantum Discord (QD) of two relativistic particles under noisy channels. We find out QD and GD tend to death asymptotically but the Entanglement Sudden Death (ESD) occurs under noisy channels. Also, teleporting of two relativistic particles via noisy channels investigated and compare fidelity for various velocities of observers.

Biography:

Yukio Tomozawa obtained DSc in 1961 from Tokyo University. He was Assistant at Tokyo University (1956- ), and at Tokyo University of Education (1957-1959): Member at the Institute for Advanced Study, Princeton, NJ (1964-1966). He was Assistant Professor (1966- ), Associate Professor (1968- ), Professor (1972- ) and Emeritus Professor (2003- ) at the University of Michigan, USA. Research Interest: Dr. Tomozawa found that the Schwarzschild metric does not fit the data of time delay experiment in the field of general relativity. He has introduced a physical metric which fits the data. It was constructed with the constraint that the speed of light on the spherical direction is unchanged from that in vacuum. This modification changes the way we understand the nature of gravity drastically. In particular, the nature of compact objects, neutron stars and black holes, is very different from that described by the Schwarzschild metric. It also explains the dark energy, supernova explosion and high energy cosmic ray emission from AGN (Active Galactic Nuclei), massive black holes.

Abstract:

The author published a proposal in 1985 that suggested cosmic rays are emitted from AGN (Active Galactic Nuclei) or massive black holes. In that proposal, the knee energy in the cosmic ray energy spectrum is the interface between the radiation-dominated expansion rate and the matter-dominated expansion rate for an expanding heat bath. As such, it requires the existence of a particle of mass at 3 PeV, the knee energy value. Assuming that this provides a mass scale for new physics, one can compute the mass of the dark matter particle as the lowest mass state of the new physics. Choosing a supersymmetric theory which provides a large mass ratio, one can predict the dark matter particle mass of 8.1 TeV. The analysis of a recent HESS data shows a gamma ray spectrum that peaks at 7.6 ± 0.1 TeV. The agreement between the theoretical prediction and the observational data suggests the search for the other predicted particles with the mass of 26.8 TeV, 78.0 TeV and 3 PeV.

Biography:

Alexey Kryukov received his Doctoral degree from the School of Mathematics of the University of Minnesota and from Division of Theoretical Physics, Department of High Energy Physics of St Petersburg State University. He is currently Professor of Mathematics at the Department of Mathematics, University of Wisconsin Colleges. His research interests are in Functional Analysis, Differential Geometry, and Quantum Theory and General Relativity. His recent publications in JMP, Physics Letters and Foundations of Physics are dedicated to finding a bridge between classical and quantum physics and gravity.

Abstract:

A recently proposed mathematical framework that unifies the standard formalisms of classical mechanics, relativity and quantum theory will be presented. In the framework, states of a classical particle are identified with Dirac deltas. The classical space is "made" of these functions and becomes a sub-manifold in a Hilbert space of states of the particle. The resulting embedding of the classical space into the space of states is highly non-trivial and accounts for numerous deep relations between classical and quantum physics and relativity. One of the most striking results is the proof that the normal probability distribution of position of a macroscopic particle (equivalently, position of the corresponding delta state within the classical space sub-manifold) yields the Born rule for transitions between arbitrary quantum states.

Biography:

Mahmoud Abdel-Aty completed his Doctorate in Quantum Optics at Max-Plank Institute of Quantum Optics, Munch, Germany in 1999. After his analytical study of quantum phenomena in Flensburg University, Germany, 2001-2003, as a postdoctorate visitor, he joined the Quantum Information Group at Sohag University in 2004, where he led the quantum optics group. He received the DSc (Doctor of Science), in 2007. Now, he is a visiting Professor at Lund University, Sweden and regular associate at ICTP, Italy. He is especially well known for seminal contributions to theories of quantum measurement, nanomechanical modeling, highly non-classical light, practical information security, and optical implementations of quantum information tasks. His current research interests include quantum resources, optical and atomic implementations of quantum information tasks and protocols. He is the Editor-in-Chief of Applied Mathematics & Information Sciences (an International Journal, USA), an Editorial Board Member for several international journals. He has published over 184 papers in international refereed journals, two books and five book chapters. He has been awarded several national and international prizes, from France, Italy, Jourdan and Egypt.

Abstract:

In this communication we discuss different aspects of information entropy and its application as an indicator of the quantum entanglement. We focus on the dynamics of multi-atom systems coupled to a nanomechanical resonator under influence of both a phonon bath in contact with the resonator and irreversible decay of the qubits. Even in the presence of enviroment, the inherent entanglement is found to be rather robust. Due to this fact, together with control of system parameters, the system may therefore be especially suited for quantum computer. Our findings also shed light on the evolution of open quantum many-body systems.

Biography:

Colin Wilmott received is PhD in mathematics from Royal Holloway, University of London. Following this, he held a two year Assistant Lectureship at University College Dublin, before going on to undertake a DFG-supported Postdoctoral Fellowship at Heinrich-Heine Universitaet Duesseldorf as well as a Marie Curie Fellowship at Masaryk University. He is also the recipient of one further Marie Curie Fellowship, but declined this offer to take up his present position as Senior Lecturer in mathematics at Nottingham Trent University.

Abstract:

We present a novel approach that generalizes the well-known quantum SWAP gate to higher dimensions and construct a regular quantum gate composed entirely in terms of the generalized CNOT gate that cyclically permutes the states of d qudits, for d prime. We also investigate the case for d other than prime. A key feature of the construction design relates to the periodicity evaluation for a family of linear recurrences which we achieve by exploiting generating functions and their factorization over the complex reals.

Biography:

Osamu Hirotahas received his PhD in 1979 from Tokyo Institute of Technology (Japan). He is Director of the Quantum ICT Research Institute of Tamagawa University and is one of the pioneers of quantum information science. He has established International Conference on Quantum Communication, Measurement and Computing (QCMC) in 1990. He has published more than 100 papers, in particular on quantum state discrimination theory and entangled coherent state.

Abstract:

Non-orthogonal quantum states in infinite dimensional space are playing a special role in foundation of quantum mechanics. The Gaussian state is a typical example of such a state that was considered at beginning of history of quantum theory. The explicit importance of Gaussian quantum states such as coherent state was certified by R Glauber, ECG Sudarshan et al in quantum optics for understanding a nature of laser. More progress has been given by H P Yuen who discovered a special property of generalized coherent state known as squeezed state and a method to verify them experimentally. Then current interest goes to entanglement of non-orthogonal quantum state such as two-mode squeezed state and quasi-Bell entangled coherent state. On the other hand, a problem of discrimination of non-orthogonal quantum states through quantum measurement that was pioneered by C W Helstrom is also a foundation of quantum physics. Its basic criteria are Bayes, Neyman-Peason, and Minimax which play different roles. In this talk, I present a historical survey of importance of non-orthogonal quantum state, and progress of quantum state discrimination. Also I introduce potential applications of theoretical achievements on non-orthogonal quantum state such as Quantum Methodology and Quantum Enigma Cipher based on recent experimental progress.

Biography:

N Y Joly is an Associate Professor at the University of Nüremberg-Erlangen, where he works on photonic crystal fibers in close collaboration with the division of Prof. Philip Russell at the Max-Planck Institute for the Science of Light. His domain of research includes dynamics of fs-pulsed ring cavity as well as nonlinear optics in PCF. In particular he is very interesting in the nonlinear generation of new frequencies like supercontinuum generation.

Abstract:

Photonic crystal fibers (PCF) offer an important platform for 3-based nonlinear optics owing to the possibility to fully tailor their dispersion properties or modify the number of guided modes. We present here two ways to use these fibers in order to generate non-classical states of light, which are important tools for quantum technologies. First, we show the generation of bright correlated twin beams, based on modulation instability in a kagomé-lattice hollow-core PCF filled with argon at high pressure. In this experiment, we used 300 fs pump pulses from a Ti:Sa regenerative system (=800 nm) to generate modulation-instability sidebands. We then observed twin-beam squeezing up to 35% below the shot-noise level. This very bright source is spatially single mode and can exhibit only a few temporal modes (<5). Second, we introduce a new design of micro structured fiber for the generation ofthe photon-triplet state through a direct decay of pump photons. Similarly to the third harmonic generation, the phase matching is usually not satisfied for the fundamental spatial modes due to chromatic dispersion. The spatial overlap is therefore small and the efficiency of the process is consequently poor. Here we use a hybrid solid-core PCF, in which total internal reflection occurs at down-converted wavelengths while an all-solid band gap governs the guidance mechanism at the pump wavelength. The overall dispersion is strongly influenced by these two mechanisms. Preliminary experiments on third harmonic generation confirm that the phase-matching between fundamental modes is indeed possible with this structure.

Biography:

Yuji Hasegawa has completed his PhD from the University of Tokyo. During and after his study, he spent several years at the Atominstitut der Österreichischen Universitäten, Vienna and became University Assistant at the University of Tokyo. He was a Lise-Meitner Fellow by Austrian Science Fund (FWF) and a PRESTO Fellow by Japan Science and Technology Agency (JST). Now he is Associate Professor at the Vienna University of Technology (TU-Wien). He has published more than 100 papers in reputed journals.

Abstract:

The validity of quantum-mechanical predictions has been confirmed with a high degree of accuracy in a wide range of experiments. Although the statistics of the outcomes of a measuring apparatus have been studied intensively, little has been explored and is known regarding the accessibility of quantum dynamics and the evolutions of a quantum system during measurements. For this sort of fundamental studies of quantum mechanics, interferometric and polarimetric approaches, in particular by the use of neutron’s matter-waves, provide almost ideal experimental circumstances. The former device explicitly exhibits quantum interference between spatially separated beams in a macroscopic scale. In contrast, interference effects between two spin eingenstates are exposed in the latter apparatus. Exploiting both strategies, alternative theories of quantum mechanics, Kochen-Specker theorem and so on are studied. Recently, as a study of quantum dynamics, neutron interferometer experiments are carried out: a new counter-intuitive phenomenon, called quantum Cheshire-cat, is observed. Moreover, extending the first experimental test of the new error-disturbance uncertainty relation by using a modified neutron polarimeter setup, we performed experiments investigating the validity of an extended uncertainty relation for mixed ensemble as well as a new noise-disturbance uncertainty relation in an entropic form. In my talk, I am going to give an overview of matter-wave optical approach to investigations of fundamental aspect of quantum mechanics.

Biography:

Kazuhisa Kakurai has completed his PhD from TU Berlin working at the Hahn-Meitner Institut, Berlin. He joined the Institute for Solid State Physics of the University of Tokyo as an Assistant Professor and became a Professor in 1997. He was the Director General of the QuBS Directorate at the JAEA until 2014 and now serves as a General Adviser in the QuBS Center, JAEA in Tokai, Japan. Currently he is also Visiting Scientist at CEMS, RIKEN in Wako, Japan.

Abstract:

Magnetic neutron scattering experiments have been playing important role to probe the quantum ground state magnetism in condensed matter physics. In this review talk I would like highlight series of inelastic neutron magnetic scattering investigations on low-dimensional magnetic systems clarifying the roles of classical fluctuations and quantum fluctuations. They include the investigations on non-linear soliton excitations in one-dimensional spin chain systems, on quantum renormalization of spin-wave excitations, on spin on excitations in S=1/2 anti-ferromagnetic Heisenberg chain, on Haldane gap for antiferromagnetic integer spin Heisenberg chain and on spin dimer systems. In these examples the microscopic knowledge of spin fluctuations provided by neutron scattering, including polarized neutron scattering, was essential to recognize the key features of macroscopic quantum ground state magnetism. The state-of-the-art scattering instruments at modern neutron facilities worldwide designed to perform these key experiments will be also briefly introduced.

Biography:

Colin Wilmott received is PhD in mathematics from Royal Holloway, University of London. Following this, he held a two year Assistant Lectureship at University College Dublin, before going on to undertake a DFG-supported Postdoctoral Fellowship at Heinrich-Heine Universitaet Duesseldorf as well as a Marie Curie Fellowship at Masaryk University. He is also the recipient of one further Marie Curie Fellowship, but declined this offer to take up his present position as Senior Lecturer in mathematics at Nottingham Trent University.

Abstract:

We present a novel approach that generalizes the well-known quantum SWAP gate to higher dimensions and construct a regular quantum gate composed entirely in terms of the generalized CNOT gate that cyclically permutes the states of d qudits, for d prime. We also investigate the case for d other than prime. A key feature of the construction design relates to the periodicity evaluation for a family of linear recurrences which we achieve by exploiting generating functions and their factorization over the complex reals.

Biography:

Maria Chekhova has completed her PhD in 1989 from the Lomonosov Moscow State University (Russia) and her habilitation degree from the same University in 2004. She is the Leader of a research group in Max-Planck Institute for the Science of Light in Erlangen, Germany, working in the field of generation and application of non-classical light (single photons, photon pairs, twin beams). She teaches a course of quantum optics at the University Erlangen-Nuremberg and a course on non-classical light at Moscow State University. She has published more than 100 papers in peer-reviewed journals.

Abstract:

Bright squeezed vacuum is a macroscopic state of light featuring non-classical properties, from photon-number entanglement and quadrature squeezing to the violation of certain types of Bell’s inequalities. By producing this state of light through high-gain parametric down-conversion in two coherently pumped crystals, one obtains a nonlinear interferometer, which offers various interesting possibilities. Among others, this is shaping the bright squeezed vacuum in space/angle and time/frequency, with the ultimate goal being to achieve a single-mode state. Moreover, this single mode can be of any desired shape, both in space and time. In our recent experiments, we have achieved generation of bright squeezed vacuum with a single spatial mode by spatially separating the two crystals forming the nonlinear interferometer. This mode had Gaussian shape but under certain conditions, spatial modes with non-zero optical angular momentum could be also obtained. By completing the nonlinear interferometer with a dispersive medium placed inside it, we achieved the generation of bright squeezed vacuum with only 1.5 frequency modes. The obtained single-mode bright squeezed vacuum can be used for various applications such as conditional preparation of non-Gaussian states, sensitive quantum phase measurements, and enhanced nonlinear optical effects.

Biography:

Michael T Deans graduated from Churchill College Cambridge in Natural Sciences, from UCL with an MSc in Biochemistry, programmed an IBM 360 and Commodore PET from the London Borough of Hounslow and his PhD thesis was compiled at King's College Hospital School of Medicine and Dentistry.

Abstract:

The ‘minion’, a coiled molecular abacus comprising 1,701 DNA base pairs bound to 189 protein units, evolved to pack chromosomes for efficient replication, explains human intelligence better than ‘neural networks’. Its 18*63 array of orderly hydrogen bonds connecting amino acids to phosphates stores an 18-character ‘word’. Memory recall involves resonance between similar minions, nerve fibres serving as wave guides and synapses as gates. Dynamically, they constitute 18-handed clocks, their time unit, τ ≈ 1.4*10-15 secs, and longest conceivable time, 6318 τ ≈ the ‘age of the universe’ limit our perception. In physics, τ replaces Planck’s constant. A hyperbolic function, the ‘Tyger equation’ corrects a wrap-around counting ‘error’, β=63-9 creating relativity twixt perception and conception. Light appears to follow a boomerang-like trajectory, our perception of space is warped, reinterpreting gravity and rendering plane surfaces as spheres. Mathematical logic using 0, ∞ and infinitesimal calculus creates an illusory world model. Familiar situations confirm Einstein’s spooky action at a distance. Substituting a set of nine polyhedrons reminiscent of Plato’s perfect solids for electron orbitals offers new insights to Mendeleev’s periodic table of elements. Protons accelerated by oscillating H-bonds through minion tunnels have sufficient energy to fuse with obstructing nuclei. Perhaps the γ-rays (evidenced by correlations with the periods and frequencies of pulsars) could be harnessed to supply power. Modelling computers and data-bases on minions could create user-friendly interfaces compensating for personality differences and facilitating understanding and agreement.

Biography:

Gabriela Barreto Lemos has completed her PhD from the Federal University of Rio de Janeiro (Brazil), working with theoretical quantum chaos and open quantum system dynamics. She went on to do experiments in quantum information, quantum chaos, optics quantum imaging. She is currently finishing her Post-doc at IQOQI-Vienna under the supervision of Prof. Anton Zeilinger.

Abstract:

Quantum effects have led to novel concepts that overcome classical possibilities. Of these interaction-free measurement and high-contrast ghost imaging have received notable attention. Here, we exploit a non-linear single-photon interference experiment introduced in the early 1990s to study fundamental aspects of quantum optics and also show its applications to quantum imaging and spectroscopy. Our experiments use spontaneous parametric down conversion, but require no coincidence detection. We discuss the role of quantum indistinguishability in quantum imaging and measures of continuous-variable correlations in SPDC. We also establish a connection between path indistinguishability and the degree of polarization of the light in our experiment, thus presenting both theoretically and experimentally a case where the partial polarization of a light beam has a solely quantum origin.

Biography:

Gautam Vemuri received his PhD (Physics) in 1990 from Georgia Institute of Technology. He was a Post-doc at JILA, from 1990-1992, and has been the Physics faculty at IUPUI since 1992. He is currently a Professor of Physics at IUPUI, and from 2002-2009 served as the Chair of the Department. His research interests are in laser physics and nonlinear optics, with special emphasis on stochastic and nonlinear dynamical behaviors of optical systems. He has served on the Editorial Board of Optics Communications, and Pramana. In 2010, he was named a Senior Member of the Optical Society of America.

Abstract:

This paper will describe our recent experimental and theoretical efforts on realizing a PT-symmetric dimer in a pair of optically coupled semiconductor lasers. The origin of PT-symmetry in this system will be motivated by starting from the Lang-Kobayashi laser rate equations and showing how they can be reduced to a PT-symmetric model with appropriate approximations. An experimental implementation of the model will be detailed and comparison to theoretical predictions is made. The results show that the coupled laser system can be a versatile model for the study of PT-symmetric quantum mechanics.

Biography:

D P Singh has completed his PhD in Experimental Nuclear Physics from Department of Physics, Aligarh Muslim University, Aligarh (India) in collaboration with Inter-University Accelerator Center (formerly as Nuclear Science Centre), New Delhi, India. His research area of interest is to study of nuclear reaction dynamics induced by heavy ions in low energy region. Presently, he is Assistant Professor at Department of Physics, University of Petroleum & Energy Studies, Dehradun (India) and is also a Young Scientist under fast track scheme sanctioned by Department of Science and Technology, New Delhi. More than 35 research publications of international repute are in his credit.

Abstract:

Thin Layer Activation (TLA) technique is one of the promising tools widely used for material performance studies such as surface wear, corrosion, erosion etc., in the micrometer range using the charged particle induced nuclear reactions. In this technique, a small section of material is exposed to an energetic beam of charged particles, so as to produce a thin radioactive surface layer. The sensitivity of this technique is high due to its capability of low level radioactivity detection by γ-ray spectroscopy. Present work explores the TLA technique using γ-ray spectroscopy for several isotopes populated in different Heavy Ion (HI) reactions, which may be of interest for the reactor technology. Since, HI beam loses energy very quickly in the material, so it produces an extremely thin layer of activity in the surface. Aiming to investigate the surface wear study, we have measured the cross-sections of various reactions from several heavy ions induced reactions on isotopically pure targets 63,65Cu, 59Co, 93Nb, 121,123Sb, 130Te, 159Tb, 169Tm & 181Ta in order to apply HI activation in the TLA technique. The experimental cross-sections of nuclear reactions leading to residues are very important to be known for the yields of the products before its application in a particular material. Details will be presented.

Biography:

Marcelino Anguiano-Morales graduated in Physics in 1999 from Facultad de Ciencias Físico Matemáticas of the Benemérita Universidad Autónoma de Puebla, México, and received his PhD degree in Optoelectronics from the same Institute in 2002. His research interest is in the area of applications of invariant beams. He has published more than 20 papers in reputed journals. He has been a full-time researcher at Instituto Tecnológico de Chihuahua.

Abstract:

Recent studies have shown that an asymmetric Bessel beam, similar to conventional Bessel beam, recover their original intensity profile after encountering an obstruction. Here, we investigate the ability of an asymmetric Bessel beam mode to recover their original intensity profile when it is perturbed by an obstruction and additionally drastically perturbed by a pattern of light generated by an appropriate annular obstruction, regardless the asymmetry degree of the mode neither the orientation of optical crescent. An obstruction placed in the path of asymmetric Bessel beam introduces an optical loss, then a series of plane waves with different amplitude that bypass the obstruction will again interfere to form an asymmetric Bessel beam. However, an optic field induced by the annular obstruction entangle the asymmetric optic field. The analysis of this effect not had even been analyzed. The purpose of the present paper is to study the mechanical properties of asymmetric Bessel beams within the general formalism of quantum optics. These results may be useful for quantum key distribution.

Biography:

1. Dr. Eugene Terry Tatum is a Stanford University graduate and a practicing physician living in Bowling Green, Kentucky. He has had a lifelong interest in astrophysics and modern cosmology, particularly with respect to the unresolved problems with standard LCDM cosmology. He is lead author of the first five introductory papers on “Flat Space Cosmology” published during the summer of 2015. He is still actively involved with Mr.Seshavatharam and Prof. Lakshminarayana in efforts to further integrate this new cosmological model with quantum mechanics and particle physics.

Abstract:

We review here the recent success in modeling our expanding universe according to the rules of flat space cosmology. Given only a few basic and reasonable assumptions and a single observational input, our model derives a variety of results which correlate with astronomical observations, including best estimates of the size, total mass, temperature, age and expansion rate of our observable universe. Our cosmological model universe is always flat and yet it shows a remarkably robust inflationary expansion effect within a tiny fraction of the first second of universal time. Our thermodynamic formula: follows Hawking’s black hole temperature formula and yet it appears to correlate closely with cosmic temperature vs. time derivations from experiments in particle physics. Lastly, our model supports recent credible challenges to the current concept of dark energy. Considering the apparent success of our model, we attempt to explain why we think it works so well, including the fact that it incorporates elements of both general relativity and quantum mechanics. We offer this approach as a possible avenue towards understanding cosmology at the quantum level (“quantum gravity”).

Biography:

Maria Chekhova has completed her PhD in 1989 from the Lomonosov Moscow State University (Russia) and her habilitation degree from the same University in 2004. She is the Leader of a research group in Max-Planck Institute for the Science of Light in Erlangen, Germany, working in the field of generation and application of non-classical light (single photons, photon pairs, twin beams). She teaches a course of quantum optics at the University Erlangen-Nuremberg and a course on non-classical light at Moscow State University. She has published more than 100 papers in peer-reviewed journals.

Abstract:

Bright squeezed vacuum is a macroscopic state of light featuring non-classical properties, from photon-number entanglement and quadrature squeezing to the violation of certain types of Bell’s inequalities. By producing this state of light through high-gain parametric down-conversion in two coherently pumped crystals, one obtains a nonlinear interferometer, which offers various interesting possibilities. Among others, this is shaping the bright squeezed vacuum in space/angle and time/frequency, with the ultimate goal being to achieve a single-mode state. Moreover, this single mode can be of any desired shape, both in space and time. In our recent experiments, we have achieved generation of bright squeezed vacuum with a single spatial mode by spatially separating the two crystals forming the nonlinear interferometer. This mode had Gaussian shape but under certain conditions, spatial modes with non-zero optical angular momentum could be also obtained. By completing the nonlinear interferometer with a dispersive medium placed inside it, we achieved the generation of bright squeezed vacuum with only 1.5 frequency modes. The obtained single-mode bright squeezed vacuum can be used for various applications such as conditional preparation of non-Gaussian states, sensitive quantum phase measurements, and enhanced nonlinear optical effects.

Biography:

Alexander Kubanek has completed his PhD from Max-Planck Institute of Quantum Optics and Technical University Munich (Germany). He spent 4 years as Post-Doctoral Fellow / Research Associate at Physics Department of Harvard University. Since 2014, he is Carl-Zeiss Professor at Quantum Optics Institute of Ulm University. He was Fellow of Bavarian Network of Excellence and International PhD-Program Quantum Computing, Communication and Control and Feodor Lynen Fellow of Alexander von Humboldt Foundation. He has publication papers in Nature, Nature Physics and Physical Review Letters.

Abstract:

Implementing efficient, highly controllable light-matter interfaces is essential to realizing the goal of solid-state quantum networks. The nitrogen-vacancy (NV) center in diamond is a promising candidate for such interfaces due to favorable properties, such as long coherence times or single shot readout capabilities. Creating optical links between remote NV centers was an outstanding challenge until the recent demonstration of photon-mediated spin-spin entanglement between NV centers separated by three meters. I will present robust control of two remote NV centers demonstrating Hong-Ou-Mandel interference to verify the indistinguishability of photons produced by remote NV centers. The NV center’s application as quantum register depends on the ability to resonantly drive closed cycling transitions and closed lambda transitions with high fidelity. The fidelity can be degraded by phonon-induced mixing within the excited state manifold, which can provide unwanted non-radiative decay channels. I will present detailed investigation of phonon-induced mixing mechanism. Besides the importance to control phonon processes for applications of the NV center in Quantum Information, the NV center’s broad range of applications as sensors relies on the ability to initialize and readout the electronic state with off-resonant laser light. Both, initialization and read out rely on an inter-system crossing (ISC) process into a meta-stable state, a phonon-assisted shelving process that has not been fully explained. We have measured the ISC rate for different excited states and developed a model that unifies the phonon-induced mixing and ISC mechanisms. Finally, I will give an outlook into recent developments with other color centers in diamond.

Biography:

Prof. Dr. Ekmel Ozbay received M.S. and Ph. D. degrees from Stanford University in electrical engineering, in 1989 and 1992. He worked as a postdoctoral research associate in Stanford University and he worked as a scientist in Iowa State University. He joined Bilkent University (Ankara, Turkey) in 1995, where he is currently a full professor in Department of Electrical-Electronics Engineering. He is the director of Bilkent University Nanotechnology Research Center. His research in Bilkent involves nanophotonics, nanometamaterials, nanoelectronics, nanoplasmonics, nanodevices, photonic crystals, GaN/AlGaN MOCVD growth, fabrication and characterization of GaN based devices, and high speed optoelectronics.

Abstract:

In this talk, we will present how metamaterials can be used for nanobiosensors and nanophotode-tector applications. We will present a label-free, optical nano-biosensor based on the Localized Surface Plasmon Resonance (LSPR) effect that is observed at the metal-dielectric interface of sil-ver nano-cylinder arrays located periodically on a sapphire substrate by E-Beam Lithography (EBL), which provides high resolution and flexibility in patterning. We will also report on UV plasmonic antenna integrated metal semiconductor metal (MSM) photodetectors based on GaN. We also report the design, fabrication, and measurement of a device comprising a split-ring resonator array on epitaxial graphene.

Biography:

Ajay Sharma completed his PhD in Atomic and Radiation Physics from Nuclear Science Laboratories, Punjabi University, India. He has 15 years of teaching and research experience. His research interest includes; atomic inner shell studies and its quantum mechanical comparison for different parameters. He has a number of publications in journals of repute and a book on alignment studies. He is a life member of Indian society for atomic and molecular Physics (ISAMP) and Indian society for radiation Physics (ISRP). He is also serving as reviewer and Editorial Board Member of repute.

Abstract:

Alignment is accounted in terms of alignment parameter A20, the fractional difference of the photo-ionization cross-sections of magnetic sub-states. The alignment of vacancies results in anisotropic distribution of x-rays originating from the filling of the vacancies as alignment is exhibited by directional correlation and polarization of characteristic X-rays and Auger electrons emitted on decay of the vacancies. Direct measurements of dependence of photo-effect on magnetic sub-states are not possible, but can be derived from the observed radioactive transitions or non-radioactive emissions. In the current work alignment studies are made for rare earth and high Z-elements using theoretical, empirical and experimental approaches. The theoretical value of alignment parameter A20 has been calculated by using the non-relativistic dipole approximation in a point Coulomb potential and analytical perturbation theory in a screened Coulomb potential. For empirical evaluations IGELCS interpolated experimental LXRF cross-section values are used along with radiative decay rates. The experimental measurements have been performed in XRF laboratories of Raja Ramanna Centre for advanced technology (RRCAT-India) using a three dimensional double reflection set-up. The comparison of alignment studies has been found almost similar via above methods and the alignment values at the L3 threshold energy >0.1were certainly higher (5-8%) than the earlier quoted experimental results of various groups.

Biography:

Gabriel Barceló completed Industrial Engineering from ETSII, Madrid, specializing in Energy Techniques in 1964; Physics from UC Madrid in 1968, and PhD in Industrial Engineering in 1973 from ETSII, Madrid. Joining the State Administration like Industrial Engineering at the Service of the Treasury in 1971, he passed on to become Finance and Tax Inspector (1977), Deputy Director of the Data Processing Center of the Ministry of Economy and Finance (1982) and State Finance Inspector in 1984. He was Professor of the UP in Madrid and Consultant. He has written numerous texts and treatises on physics and in the last 30 years has been devoted to research on dynamic systems and rotational dynamics.

Abstract:

We propose new dynamic hypotheses to enhance our understanding of the behaviour of the plasma in the reactor. In doing so, we put forward a profound revision of classical dynamics. After over thirty years studying rotational dynamics, we propose a new theory of dynamic interactions to better interpret nature in rotation. This new theory has been tested experimentally returning positive results, even by third parties. Plasma rotation is an essential factor in the analysis of the turbulent transport of momentum in axisymmetric systems. In magnetic confinement fusion systems, the plasma circulates in the container at a constant movement, which we could define as rotation with respect to its walls. Notwithstanding, it has been shown that the plasma in the reactor can initiate spontaneous circular movement or rotation, without the need for any external dynamic momentum input. The theoretical development of this behaviour is still under study, and the origin of this intrinsic rotation is still unclear. We suggest the exploring of a new type of dynamic confinement based on the Theory of Dynamic Interactions (TDI) and one that is compatible with magnetic confinement. Applying this criterion we are proposing would enable a twin physical-theoretical principle to isolate plasma and try to minimize its turbulence. We suggest that these new dynamic hypotheses, which we hold applicable to particle systems accelerated by rotation, be used in the interpretation and design of fusion reactors. We believe that this proposal could, in addition to magnetic confinement, achieve confinement by simultaneous and compatible dynamic interaction.

Biography:

Konstantinos Moulopoulos has completed his PhD from Cornell University, NY, USA, and is working with N W Ashcroft on many-body Quantum Physics, and especially Metallic Hydrogen and its possible paired or superconducting phases. After 3 years in France (CNRS), where he was a European Community Postdoc working on exotic electronic properties of Quasicrystals, he has moved to the University of Cyprus, where he is an Associate Professor, currently focusing on topological phenomena in Quantum Condensed Matter Physics.

Abstract:

A proximity influence of a magnetic field on adjacent regions in flat 2D space is shown to be a natural consequence of the Aharonov-Bohm effect combined with the non-existence of magnetic monopoles. This influence is confirmed through a recent theory that goes beyond the standard Dirac phase factor (and that incorporates wave-function-phase-non-localities) and affects numerous results in the literature on extended arrangements with inhomogeneous magnetic fields. There seems to be a gauge-ambiguity remaining that has been over-looked in all previous works. The deep origin of this annoying feature is explained and it is shown that it can be removed when outside (remote) fluxes are properly quantized. This suggests natural ways to eliminate the artificial effect for confined systems, leading to quantization of macroscopic quantities in a wide range of systems of current interest. Examples include applications (i) to a spherical geometry, that leads to the standard Dirac quantization of magnetic monopoles, (ii) to a cylindrical configuration, by additionally invoking Axion Electrodynamics, that naturally leads to quantization of dyons (the Witten effect), as well as quantization of Witten current, leading in turn to the quantization of Hall conductance, either (a) in whole or (b) in half integral units of e2/h (corresponding to conventional Quantum Hall Effect systems and to exotic magneto-electric phenomena in topological insulators, respectively). Similar considerations with adjacent t-dependent electric fields lead to the possibility of manufacturing of interesting quantum devices (that induce Integral Quantum Hall Effect and other topological phenomena in novel time-dependent ways from outside the system).

Biography:

Peng Sheng has completed his PhD from Graduate University of Chinese Academy of Sciences, China. He is Associated Professor and Director of a research team focusing on the control system for the neutral beam injectors at Institute of Plasma Physics, Chinese Academy of Sciences. He has published more than 30 papers in reputed journals.

Abstract:

The control system of Neutral Beam Injector (NBICS) is developed in accordance with the experimental operational characteristics of the EAST-NBI system. NBICS is based on the computer network technologies and classified according to the control levels, consists of three levels: a remote monitoring level, a server control level, and a field control level. The 3-layer architecture is capable of extending the system functions and upgrading devices. The chosen platform is a CPCI-based and PXI-based computerized network system. In each beam-line, there are three PXI/CPCI crates housing several boards for performing analogue signal acquisition, analogue voltage generation, signal conditioning, digital input detection and digital output generation. NBI Data Acquisition System consists of field instrument and measurement devices, servers and remote data processing terminals. Two server computers running CentOS 6.3 operating system act as control server and data server respectively. A virtual instrument for the timing system is developed with LabVIEW 2010 on the PXI-based platform. Both of the ion sources of a beam-line are designed to operate independently. Experimental results demonstrate that the visualization and automation of NBI experimental operations are successfully implemented by using the functions of remote monitoring, interlock protection, and data processing.

Biography:

Mahmoud Mahdian has completed his PhD from University of Tabriz. He is Associated Professor and Director of a research team focusing on Relativistic quantum entanglement at University of Tabriz. He has published more than 20 papers in reputed journals.

Abstract:

We show that the projections of a Relativistic Spin Operator (RSO) massive spin-½ particle on a world-vector which can be in time-like or null tetrad direction are proportional to the helicity or Bargman-Wigner (BW) qubit, respectively. Here we consider Lorentz transformations of spin-momentum correlation of one massive spin-½ and spin-1 particle states, which have been constructed both in helicity basis. For convenience, instead of using the superposition of momenta we use only two momentum eigenstates (p1 and p2) for particle. Consequently, in 2D momentum subspace we describe the structure of one particle in terms of the two-qubit system. We present a new approach to quantification of relativistic entanglement based on Non-Linear Entanglement Witnesses (NLEWs), which is obtained by a new method of convex optimization. The effect of Lorentz transformation would decrease both the amount and the region of entanglement. We also study quantum correlation dynamics of two relativistic particles which is transmitted through noisy channels. We compare the Geometric Discord (GD) and quantum Discord (QD) of two relativistic particles under noisy channels. We find out QD and GD tend to death asymptotically but the Entanglement Sudden Death (ESD) occurs under noisy channels. Also, teleporting of two relativistic particles via noisy channels investigated and compare fidelity for various velocities of observers.

Biography:

Nawaz has completed his PhD at the age of 30 years from Department of Mathematics Quaid-i-Azam University Islamabad. He is the Assistamt Professor of Mathematics at COMSATS Institute of Information Technology Islamabad . He has published more than 25 papers in reputed journalsand has been serving as a reviewer of many well-reputed journals.

Abstract:

This article aims to investigate the mode-matching approximation of a two dimensional waveguide problem. Each of the ducts is bounded by a flexible surface of different height and, thus, the underlying eigenproblem is non-Sturm-Liouville. While developing the orthogonality relation, the corresponding problem can be solved using the mode-matching technique. The amplitudes of reflection and transmission coefficients are discussed numerically. Further, the distribution of power between the fluid regions and the flexible wall is analyzed. The truncated system is verified as it satisfies the matching interface conditions and the power balance as well.

Biography:

Chithrabhanu P is a PhD student at physical Research Laboratory Ahmedabad, India. He works in experimental and theoretical quantum optics and quantum information. He has published 6 papers in reputed journals during the period of last one year. He has presented research papers in 4 international conferences and has given invited talk in “Young Quantum” meet at HRI, Allahabad, India.

Abstract:

With entanglement between two quantum bits, protocols have been demonstrated for teleporting an unknown quantum state, super dense coding of information and secure communication. An arbitrary qubit can be teleported from one particle to another with the use of an entangled pair of particles, which had been experimentally verified in different quantum systems. We present a scheme to generate three particle hyper-entanglement utilizing polarization and Orbital Angular Momentum (OAM) of a photon. In this case one particle is maximally entangled with other two particles in different degrees of freedom. We show that the generated state can be used to teleport a two-qubit state described by the polarization and the OAM. The new teleportation method overcomes the difficulty of measuring in two particle polarization Bell basis, by implementing independent single particle two-qubit Bell measurements. We give novel schematic setups for the realization of gates and measurements involved in the teleportation. The described three particle hyper-entangled states can be utilized for a multi-party teleportation scheme with two senders and a common receiver.

Biography:

Fabian Hartmann studied Physics at the University of Würzburg, Germany, and has completed his PhD from “Technische Physik” (Chair of Applied Physics), University of Würzburg. Currently, he is a post-doctoral research associate in the Nanoelectronics group at “Technische Physik”. His current research interests are noise assisted electron transport phenomena in low-dimensional semiconductor devices and resonant tunneling diode based sensors for infrared light detection applications. He has published more than 15 papers in reputed journals.

Abstract:

The exploitation of excess heat and noise has become a topical and significant branch of research, especially in electronics, where an ongoing trend towards sustainable, energy efficient and autonomous systems can be observed. Such a reuse is mainly possible by utilizing nonlinear systems and phenomena like e.g. stochastic resonance (SR) which enhances weak input signals by coupling to a noise floor. Furthermore, noise can improve the operation of logic gates: logical stochastic resonance (LSR) renders logic gates fault tolerant and reliable when the noise is situated in a suitable range. Both LSR and SR have in common the improvement of functional capabilities by application of noise to a system. Here, we present a Coulomb-coupled quantum dot (QD) device that is capable of generating a current through a QD by rectifying voltage fluctuations applied to the other QD. The magnitude and sign of the rectified current can be switched and controlled by external gates, and using these gates as logic inputs, enables the realization of various Boolean logic gate operations. Dependent on the noise amplitude and the control gate voltage, the device features AND, OR, NAND and NOR gate functionalities which can be switched between by either solely changing the noise magnitude or by a sole variation of the control gate voltage.

Biography:

Binayak S Choudhury is Full Professor of the Department of Mathematics, Indian Institute of Engineering Science and Technology, Shibpur, India since 2003. He has supervised 13 PhD students and published more than 175 research articles in journals in several areas of Pure Mathematics, Applied Mathematics and Theoretical Physics. He has delivered lectures in many institutes and universities across the world. His works in Theoretical Physics are in Quantum Physics and Cosmology.

Abstract:

Quantum entanglement is considered as the most precious resource of Quantum Technology. Originally, the concept appeared in the famous EPR paper in 1935 in which entanglement between two parties was defined. It was only during the last decade of the twentieth century that the power of entanglement was discovered. In recent years, studies on entanglement attracted much attention due to its uses in the absolutely safe information transmission through Quantum Communication Protocols like Quantum Teleportation, Quantum Key Distribution, Quantum Secret Sharing, etc. Multipartite entanglement was considered and put to use at a later point of time. The quantification of entanglement had become necessary for which measures of entanglement have developed. In most of the cases, maximally entangled states are used, especially in Communication Protocols, although there are some reports of utilizing non-maximally entangled states as well. Thus, there is a need to increase the amount of entanglement, that is, to find the ways of creating more entanglement starting from a state which is initially less entangled. For this purpose Entanglement Concentration Protocols are proposed. Particularly, our discussion is on the protocols for entanglement concentration of multipartite quantum states, that is, quantum states which are shared by more than two parties.

Biography:

Alexey Kryukov received his Doctoral degree from the School of Mathematics of the University of Minnesota and from Division of Theoretical Physics, Department of High Energy Physics of St Petersburg State University. He is currently Professor of Mathematics at the Department of Mathematics, University of Wisconsin Colleges. His research interests are in Functional Analysis, Differential Geometry, and Quantum Theory and General Relativity. His recent publications in JMP, Physics Letters and Foundations of Physics are dedicated to finding a bridge between classical and quantum physics and gravity.

Abstract:

A recently proposed mathematical framework that unifies the standard formalisms of classical mechanics, relativity and quantum theory will be presented. In the framework, states of a classical particle are identified with Dirac deltas. The classical space is "made" of these functions and becomes a sub-manifold in a Hilbert space of states of the particle. The resulting embedding of the classical space into the space of states is highly non-trivial and accounts for numerous deep relations between classical and quantum physics and relativity. One of the most striking results is the proof that the normal probability distribution of position of a macroscopic particle (equivalently, position of the corresponding delta state within the classical space sub-manifold) yields the Born rule for transitions between arbitrary quantum states.

Biography:

Michael N Leuenberger received his PhD in Theoretical Physics in 2002 from the University of Basel in Switzerland. After his Postdoctoral positions at the University of Iowa and at the University of California, San Diego, he joined in 2005, the NanoScience Technology Center at the University of Central Florida and became tenured Associate Professor in 2011. In 2008, he received the DARPA/MTO Young Investigator Award. His current research areas include quantum information processing in topological insulators, optoelectronics in 2D materials, and solar energy harvesting in nanoparticles. He has published more than 60 peer-reviewed papers and 4 book chapters.

Abstract:

The non-zero thickness of transition metal dichalcogenide (TMDC) single layer (SL) manifests in electron states forming classes of states even and odd with respect to reflections through the central plane. These states are energetically well separated and give rise to two bandgaps Eg|| and Eg for the optical in-plane and out-of-plane susceptibilities || and , respectively. Because of this, odd states are often neglected, which effectively reduces TMDC SL to a perfect 2D system. We study states bound to various vacancy defects in TMDC SL and show that odd states play an equally important role as even states. In particular, we show that odd states bound to VD lead to resonances in  inside Eg in TMDC SL with VDs. Additionally, we demonstrate that the states bound to VDs are not necessarily confined to the bandgap in the even subsystem, which requires the extension of the energy region affected by the bound states. The resulting optical signatures not only provide the possibility to identify the type but also the concentration of VDs, thereby paving the way to quantifying the purity of defected TMDC SL containing VDs.

Biography:

G Rupper received his BS and MS degrees in Electrical Engineering and Computer Engineering from Brigham Young University in 1999. He worked for seven years with Qualcomm Inc. working on CDMA Cellular Telephone Technology. In 2010, he received his PhD in Optical Science from the University of Arizona. His dissertation was based on theoretical work on laser cooling of semiconductors. He also did some experimental work on strong coupling between a quantum dot and a photonic crystal. He joined ARL as a Post-doc in 2010 and is currently working on multi-scale modeling of semiconductor devices.

Abstract:

Electron density oscillations in the transistor channels - plasma waves in the two-dimensional electron gas - determine the high frequency device response. Plasmonic field effect transistors have emerged as very sensitive, tunable, and extremely fast detectors of THz radiation. They have been implemented using silicon (CMOS), AlGaAs/InGaAs HEMTs, and AlGaAs/InGaAs HEMTs, with the HEMTs shown to operate more efficiently at higher THz frequencies. These HEMTs have both gated and ungated sections of the device channel between the source and drain, and the photovoltaic regime of operation requires an asymmetric gate placement in the device channel. The interactions of the plasma waves in the gated and ungated channel regions strongly affect the overall response and have been investigated in numerous publications. This work addresses a new aspect of such interaction - the effect of the relative position of the gated and ungated section. We show this previously unexplored effect plays a dominant role in determining the response. The results of the numerical simulation based on the solution of the complete system of the hydrodynamic equations describing the electron fluid in the device channel show that the inverse response frequency could be approximated by the sum of the gated plasmon transit time in the gated section of the device, the ungated plasmon transit time in the ungated section of the device between the gate and the drain, and the RC gate-to-source constant. Here R and C are the resistance and capacitance of the gate to source section. Hence, the highest speed is achieved when the gate is as close to the source as possible. This suggests a novel plasmonic detector design, where the gate and source electrode overlap, which is shown to have a superior frequency response for the same distance between the source and the drain.

Biography:

Shien-Kuei Liaw received double Doctorate in Photonics Engineering from National Chiao-Tung University in 1999 and in Mechanical Engineering from National Taiwan University in 2014, respectively. He joined the Chunghua Telecommunication, Taiwan, in 1993. Since then, he has been working on optics communication, sensing and fiber based devices. He was a visiting Researcher at Bellcore (now Telcordia), US for six months in 1996 and a visiting Professor at University of Oxford, UK in autumn 2011. Currently, he was the Director of Optoelectronic Research Center and now is the distinguished Professor at National Taiwan University of Science and Technology (Taiwan Tech). He has been awarded 37 patents and has published 240 journal articles and international conference presentations. He has been actively contributing for various conferences as program chair, organizing committee chair, session chair and invited speaker. He is a senior member of IEEE, OSA and SPIE.

Abstract:

Recently, much more attention has been directed to diode-pumped single-longitudinal-mode (SLM) fiber lasers because of their high reliability, compactness, and capability of shot-noise-limited operation in the megahertz frequency range. On the other hand, tunable laser sources have seen various applications in recent years such as optical switching, network protection or digital communication. Among various lasers, fiber lasers present the advantages of high brightness, low intensity noise, thermal stability, excellent coupling into a single mode fiber and better compatibility with fiber components. In this talk, we will review and discuss several types of single-longitudinal mode (SLM) linear cavity, tunable fiber lasers, either in C+L band or 1064 nm band. For linear-cavity fiber laser schemes, the elements may base on a loopback optical circulator (OC), a broadband mirror, a Faraday rotator mirror or a 2x2 fiber coupler integrated a partial reflectance fiber Bragg grating (FBG) as the front cavity end. For SLM selection, using multiple subring cavities based on the Vernier effect, a piece of gain fiber saturable absorber as modes filter or their hybrid type. For wide-tuning range fiber laser, the wavelength tuning mechanism include the use of a broadband fiber mirror (BFM) integrated tunable FBGs as cavity ends, using bending device to facilitate wavelength tuning of FBG, a large tuning range cover C+L band with good resolution of 0.1 nm is obtained. Laser characteristics such as output, signal-to-noise ratio, linewidth, threshold pump power, pumping slope efficiency and side mode suppress ratio are measured. One example of fiber laser characteristics are 1 MHz, 59 dB, 13% and 0.1 dB, respectively, for linewidth, side-mode suppression ratio, quantum efficiency and power variation of whole tuning range. The pumping power efficiency may be improved more than 10% by recycling the residual pump power to the gain medium. Have the advantages of simpler structure, larger pump slope efficiency and shorter cavity, these fiber lasers may find potential applications in various ways.

Biography:

Nawaz has completed his PhD at the age of 30 years from Department of Mathematics Quaid-i-Azam University Islamabad. He is the Assistamt Professor of Mathematics at COMSATS Institute of Information Technology Islamabad. He has published more than 25 papers in reputed journals and has been serving as a reviewer of many well-reputed journals.

Abstract:

The study of non-uniform obstacles in an otherwise uniform waveguide has received wide attention in the literature. The transmission of elastic and electromagnetic waves, underwater sound propagation, and sound scattering in ducts or pipes are the major application areas in waveguide theory. Particularly the curiosity is to reduce the ducted fan noise emanated from aero engines, power stations and heating, ventilation, and air conditioning (HVAC) systems. There are several mathematical models exist for computing sound attenuation by such dissipative devices which are often used to attenuate broadband noise arising from fluid moving devices likewise fans and internal combustion engines. In this study we aim to investigate theoretically the mode-matching analysis of a two dimensional waveguide problem subject to rigid and flexible walls. The governing mathematical model characterizes the system to be non Sturm-Liouville. Therefore the development of generalized orthogonality relations corresponding to acoustic transmission through the duct regions is the major necessity to find out solution. Also appropriate edge conditions including, clamped and pin-jointed are considered in order to guarantee the uniqueness of solution. We investigate amplitudes of reflection and transmission coefficients along with power distribution for each duct region. The aims of this study were to assess distribution of power through the fluid regions and the flexible wall using different edge conditions. In order to see the accuracy of results the truncated system is verified through the matching interface conditions and the power balance as well. In this way the mode-matching technique proves to be surprisingly accurate and is a useful tool for solving acoustic structural problems.

Biography:

C Wei Xu, a Chief Architect at Verizon Communications USA, is an IT expert for 20+ years. Early in 1994, he developed Gauntlet Firewall, rated as the #1 during 1995-1998. Meanwhile, he created the entire commercial IPSEC VPN late in 1994, known as the first VPN product in IT history. During 1999 to 2005, he founded a start-up pioneering in Secure Cloud of Software-defined Networking. Since 2006, he served as a principle/chief architect at Northrop Grumman, DOT, Military, USAID, commercs and governments. Establishing Virtumanity* in 2012, he published books of philosophy followed by scientific papers in: “Theory of Physical Cosmology – Universe Particles” and “Theory of YinYang Physics – Horizon Fields”, revealing secrets of all elementary particles, the topological framework of classical and contemporary physics, as Unified Field Theory. He holds BS and first MS degrees in Theoretical Physics from Ocean University of China and Tongji University, and the second Master’s Degree in Electrical and Computer Engineering from University of Massachusetts.

Abstract:

For the first time in mankind history, the natural laws of our universe is uncovered systematically, philosophically and mathematically, which convey the principles of YinYang movement governing all physical events, transforming universe particles, and constituting extendable physical hierarchies. It develops the dynamic fields, called Horizon Fields, which form and give rise to physical horizons: From inception of time, energy, mass, and space, to elementary particles, to quantum fields, to thermodynamics, to electromagnetism, gravitational force, and beyond. These applications of the evolutionary processes to contemporary theoretical physics therefore derive a complete picture of the principal equations, important assumptions, and essential laws, promoting scientific research to the next level by: 1. Delivering the terminology for a topological framework of cosmology aligned with the synthesis of virtual and physical worlds in a hierarchical taxonomy of the universe, 2. Describing full-scale properties for all fundamental particles, including quarks, leptons, bosons, dark energy, and composite particles, and their entire nature formation of physics, 3. Delineating YinYang physics as a foundation of Cosmology, Quantum Physics, Astrology, and Biophysics across all mass and matter. Intuitively following the system of YinYang philosophy, this concise theory is accessible and replicable by readers with a basic background in mathematical derivation for theoretical physics.

Biography:

Chaimae Azahaf is a PhD at the age of 27 years from University of Mohamed 5 faculty of science Morocco . He has published 5 papers in reputed journals.

Abstract:

Optical properties and spontaneous polarization of cubic perovskite BaHfO3 under pressure have been investigated using the Full Potential Linear Augmented Plane Wave (FP-LAPW) method as implemented in the Wien2k code, in connection with the Generalized Gradient Approximation (GGA). The pressure is among the external factors that can affect physical properties of materials; we will show that the pressure affects the optical properties, more accurately it allows the reduction of band gap, and increase the spontaneous polarization in a quasi-linear behavior.These results confirm that BaHfO3 is a piezoelectric material, and the Optical absorption and effective mass increasing as pressure increases.

Biography:

Sayedehsan Alavi Ghahferokhi was born in Esfahan, Iran, in 1978. He received the PhD degree from the Universiti Teknolgi Malaysia (UTM) in 2012. From June 2013 to June 2014, he was with the light wave communication research group (LCRG) at faculty of Electrical Engineering (FKE), UTM Johor, where he conducted his post doctorate research fellowship. In July 2014, he joined to the center of excellence in Telecommunication Technology (CoE, UTM-MIMOS) in FKE of UTM as a senior lecturer staff. His current research interests include optical communication, solitonic based optical communication, radio over fiber, visible light communication, and power-line communication.

Abstract:

Smart grid (SG) systems form the backbone of various services that provide comfort and efficiency enhancements. Increasing numbers of SG users cause additional demands by applications on the SG, and this trend eventually leads to the SG being unable to deliver services with sufficient quality. A system of optical and wireless access technologies, namely radio over fiber (RoF), is proposed here for adoption in SG systems (SG-RoF) in order to ensure provision of adequate capacity in line with transmission bandwidth service requirements. This paper details a microring resonator (MRR) system for use in SG-RoF systems, whereby extra optical carriers are generated so as to increase the number of serviceable remote antenna units (RAUs). A number of very useful and widely used smart grid applications, namely video surveillances and advanced metering data, are also described in the context of the SG-RoF. The performance of well-known algorithms, such as proportional fairness, modified largest weighted delay first, exponential proportional fairness and exponential rule, are evaluated in this work to determine the optimal candidate for use in the proposed system.

Biography:

Patrick VAUDON is currently Professor at University of Limoges and researcher at Xlim Lab. Its current subjects of interest are electromagnetism, and more generally the wave equation in all domains of physics. He has published about 50 papers in reputed journals and has been serving as an editorial board member of many internernational conferences.

Abstract:

Dirac equation is one of the fundamental equation of quantum mechanics. Classical solutions in terms of spinors are well known, but these spinors are never completely developped on a base of standing wave modes. Using methods issued from electromagnetism, a complete research of solutions of Dirac equation in terms of standing waves mode is presented. It is shown that the whole solution needs the resolution of an homogeneous system of sixty four equations and then sixty four unknows. Explicit solutions will be presented. The verification of their exactitude will be demonstrate in a convincing and straightforward manner. It will be shown that these exact solutions can have an energy interpretation and that such an interpretation highlight in a new manner the concept of wave-particle and the principle of indeterminacy.

Biography:

Nadia A Abdulrahman has completed her PhD from Glasgow University, College of Science and Engineering, School of Chemistry. She is a lecturer of physical chemistry at Baghdad University. She has published five papers in Iraqi’s, British and American`s journals. In addition to 20 years teaching in academia, she had learned more skills during her PhD course such as: design and fabricate chiral and achiral plasmonic nanostructures, using SEM and AFM microscopy for metamaterials and biological molecules imaging, using the fabricated chiral and achiral plasmonic nanostructures as biosensors to detect and characterize biological molecules via UV and CD spectroscopy, using SHG spectroscopy to characterize the non-linear optical activity of 2D chiral plasmonic metamaterials and finally, using femtosecond laser irradiation to map hot-spots on the surface of chiral plasmonic metamaterials.

Abstract:

In this research, we present a novel method for visualising plasmonic `hot spots` upon plasmonic surfaces of gold nanostructures. Here, femtosecond laser pulses have been used to map the locations of localised high intensity electromagnetic fields (the hot spots). Upon irradiation with 800 nm femtosecond laser pulses, which may be linearly or circularly polarised, it is possible to reveal the locations of plasmonic hot spots since the nanostructures are physically damaged i.e. undergo melting by the intense heat generated by femtosecond laser pulse irradiation. SEM microscopy may be used subsequently to map the surface to show which areas have been damaged, and hence reveal where the hot spots are. 2D arrays of quadric units (arranged in a racemic fashion) consisting of two patterns, gammadionsand G-like shapes, have been used as plasmonic chiral nanostructures. It has been found that irradiation with linearly polarised light affected segments that are perpendicular to the polarisation direction of the incident beam. However, irradiation with circularly polarised light affected both horizontal and vertical segments of the nanostructures regardless of the sense of individual features (i.e. left-handed or right-handed) or the sense of the circular polarisation of the incident beam (i.e. clockwise or counter-clockwise). Hence, no enantio-selectivity was observed.

Biography:

Ian O’ Driscoll obtained his PhD at UCC, Ireland in 2008, where he studied the carrier dynamics of InAs quantum dots. He then worked at Cardiff University, UK, as a Research Associate until 2012, where he investigated the physics of quantum dot laser materials and the consequences of carrier localization on device behaviour. Since 2013, he works at the Tyndall National Institute, Ireland, where he is a recipient of the Starting Investigator Research Grant funded by Science Foundation Ireland. He has published over 30 papers in reputed journals and currently serves as guest editor for a special issue in MDPI Photonics.

Abstract:

This work uses semiconductor quantum dots, which are nanoscale inorganic materials, in order to achieve extremely short optical light pulses. Such pulses find use in high bit rate optical communications, wave division multiplexing, microscopy, multiphoton imaging and the generation of terahertz signal sources. Passively mode locked ultrashort pulses are created using an absorber section within a quantum dot lasing cavity, and the repetition rate, or time between successive pulses, is controlled by the length of the cavity. The work confirms the merits of random population for the generation of ultrashort pulses. When the quantum dots are randomly populated, they are independently occupied, which allows access to the entire gain spectrum. Sub picosecond pulse widths were achieved using these methods, without any significant device engineering. A relatively simple method for significantly improving the optical pulse width when the dots are randomly populated will also be highlighted. These techniques can be applied to any quantum dot material.

Biography:

Kumar Gautam is pursuing his PhD from NSIT, University of Delhi. He has published two papers in reputed journals Quantum Information Processing (Springer) and has been serving as a TRF (Teaching cum Research Fellow) from last 3 and half year.

Abstract:

Belavkin's quantum filtering equations with input Brownian motion as the measurement are formulated and these filtering equations are implemented in MATLAB using basis truncations. If is observable at time zero and it evolves under noisy Schrodinger dynamics to = , then can be described by an infinite dimensional matrix even though is a finite dimensional matrix. The finite dimensional truncaed dynamics of is described as well as its MATLAB implementation. Further if is the Abelian non-demolition Von-Neumann algebra at time t, then the filter =𝔼( | ) satisfies an infinite dimensional Belavkin equation. This filtering dynamics is also truncated and its dynamics is simulated using MATLAB. The remarkable feature about these MATLAB simulation is that no random process needs to be generated. A random process in quantum probability is simply an operator valued function of time which has different probability distribution in different states.

Biography:

Mohammad Mizanur Rahman has completed his PhD at the age of 35 years from Kyushu University and postdoctoral studies from Nanyang Technological University. He is a Principal Scientific Officer and Head of Nuclear Energy Division, Energy Institute, Bangladesh Atomic Energy Commission. He has published more than 25 papers in reputed journals.

Abstract:

Supercritical Water Cooled Reactors (SCWRs) are promising nuclear systems partly on account of their high thermal efficiency (about 45% compared to about 33% efficiency for current Light Water Reactors) and partly on account of their relative simplicity in terms of plant construction. SCWR is the only reactor design using water as a coolant among the six reactor types being investigated by the GEN-IV International Forum (GIF). SCWR can be used in land based power plants as well as within marine vessels (ships and submarines). As SCWR uses water as a coolant, it is very compatible with the operating environment of ships which are operating in the water. More importantly, the SCWR system is very compact which is suitable for transportation applications. In general, SCWR designs can be classified as either pressure-vessel type or pressure-tube type. The pressure-vessel concept was proposed first in Japan and again more recently by the Euratom partnership. The pressure tube concept was first proposed in Canada, and is referred to as the Canadian SCWR. These concepts have many similar features such as; outer pressure, outer temperatures, steam cycle options, materials and heat transfer characteristics. In this study, a qualitative analysis of existing SCWR conceptual designs was conducted. A comparison of these designs as well as a review of reactor designs for submarine and ship was carried out. Based on the operating conditions and performance requirements for ships, an optimal SCWR design for ships was proposed. The verification of this design requires further quantitative analysis and experiment.

Biography:

Iraj Sadegh Amiri received his BSc (Applied Physics) from Public University of Oroumiyeh, Iran in 2001 and a gold medalist MSc from Universiti Teknologi Malaysia (UTM), in 2009. He was awarded a PhD degree in photonics in 2014. He has published more than 300 journals/conferences papers and books/chapters in Optical Soliton Communications, Laser Physics, photonics, Nonlinear fiber optics, Quantum Cryptography, Nanotechnology, Biomedical Physics and Biotechnology Engineering. Currently, he is a senior lecturer in University of Malaya (UM), Photonics Research Center (PRC), Malaysia.

Abstract:

Generation of dual-wavelength fiber lasers (DWFLs) has attracted many research interests recently. We demonstrate a stable tunable dual-wavelength erbium-doped fiber laser generated by launching mode-locked laser into an add-drop microring resonator. Two Silicon-based high index contrast microring resonators with Q-factors of 1.2 ×105 and 0.6 ×105 have been used as add-drop filters independently. The two silicon oxynitride (SiOxNy) microring resonators have different diameters and used as narrow band filter for the generation of stable tunable dual-wavelength lasers with variable free spectral range (FSR) accordingly. As a result, multi-wavelength generation was achieved and demonstrated both theoretically and experimentally with free spectral range (FSR) of 0.202 and 0.404 nm corresponding to the microrings’ diameter of D=2.54 and D=1.27 mm. A high resolution tunable band pass filter (TBPF) and FBG are then used to filter out switchable and tunable dual-wavelength signals. The dual-wavelength fiber laser (DWFL) with different FSR from 0.404 to 3.232 nm as an integer coefficient of minimum obtained FSR presents. The resulting dual-wavelength output had a side-mode suppression ratio (SMSR) of more than 30 dB. Therefore, the microring resonator can be readily integrated into a photonics integrated chip (PIC) for multifunctional applications as the achieved FSR is in linear relation with the ring resonators’ diameter.

Biography:

Benjamin Kasao Karhaza has completed BA from Great Lakes School of Theology of Bujumbura as a part of George Fox University, State of Oregon/USA and High School studies from Nyabiondo Institute, Masisi Territory in North-Kivu Province of DRC. He is the Founder and Coordinator of CO.PA.D ″Collectif “Paix et Développement” located in Goma Town, a Trauma and Hearing the Memories Organization in the Province. He has published papers in reputed journals and has been serving as a Pastor, Peace artisan, Trauma Healer and Mining Manager. Since 2011, he founded the CO.E.MI, a mining company in our native land, where the space mining is located and the Office is located in Goma Town and working with partners there. Today, he is working as Mining Manager of CO.E.MI under CO.PA.D and other works as part time.

Abstract:

Democratic Republic of Congo is becoming a country where all several and critical situations of everything are bad. The situation of war in the East part of Congo is the target place of all army groups and all people who want to driver disorder in the country. The government is unable to stabilize the country and to stop war here. Several numbers of NGO’s and International Organization are working in the country to help in mining area but they fell because they don’t know the real problems which Congolese are traveling in and communities who are living nearby the mining spaces in raising development. They are creating Micro projects and joining Cooperation’s. Several consequences are numbered and make people in ″Brain and Stress Disorders″. The Trauma situations are caused by sexual violence’s, tortures, kidnapping and end by suicides. There are also other problems of poverty and cohabitation of ethnics in the provinces and the need of conflict resolutions, mediation and peace building into communities here. Trauma in DRC is becoming a great and critical situation which all people ignore and no one is helping the memories. It’s in that way that CO.E.MI (Cooperative Economique Minère/Kaseke) like to participate to the Mining conference of Cape Town to promote economic cooperation’s with people from worldwide to get other skills and knowledge to help communities in the DRC.