David Pappas
NIST, USA
Title: Electromagnetically induced transparency in circuit quantum electrodynamics with nested polariton states
Biography
Biography: David Pappas
Abstract
In this presentation, we report the observation of Electromagnetically induced transparency (EIT) in a superconducting circuit system using strictly single-photon processes and polariton states in the nesting regime. EIT originates from quantum interference in an atomic three-level system. To achieve this, we first drive the dressed cavity-qubit states of a two-dimensional circuit QED system. This generates a set of polariton states. With proper tuning, we achieve the nesting regime, defined by the regime where the first two levels of the Jaynes-Cummings ladder bracket the drive frequency. The lowest three energy levels of the polariton states are utilized to form the $Lambda$-type system. EIT is observed and verified by Akaike's information criterion based testing. Negative group velocities up to $-0.52pm0.09$~km/s are obtained based on the dispersion relation in the EIT transmission spectrum. This results in a versatile, on-chip quantum-optics platform using tunable polaritons.