|DATE||January 16 (Wed), 2019|
|INSTITUTE||Institute of Quantum Electronics, ETH Zurich, Switzerland|
|TITLE||Towards quantum polaritonics: Strongly interacting polaritons|
Realization of a strongly interacting photonic systems is one of the essential issues in quantum optics. In solid-state systems, exciton-polaritons in micro-cavities, consisting of a cavity photon and a quantum well exciton, have interactions based on short-range exchange interaction between direct excitons. These interactions have lead to manifestation of a number of intriguing collective phenomena such as formation of spontaneous coherence, observation of vortex-antivortex pairs and dark solitons, and realization of polariton Josephson effect. However, a mean field approach has been successful to describe all these observations accurately. Increasing interactions between polaritons further is crucial to explore physics beyond mean-field description and to explore a new regime of strongly correlated photons.