Symmetry and Topology of the Polariton Condensate in 2D Dirac Materials

Explore the fascinating world of polariton condensates in 2D Dirac materials through this 47-minute lecture by Suk Bum Chung from the PCS Institute for Basic Science. Delve into the intricate interplay between Coulomb interaction and electron-photon coupling in quantum wells within optical microcavities, leading to the formation of polaritons and Bose-Einstein condensates. Examine the additional physics introduced by nontrivial Berry phases in gapped two-dimensional Dirac materials like MoS2 and WSe2. Discover how the competition between electron-photon coupling and Coulomb electron-electron interaction results in a complex phase diagram for polariton condensates, featuring both topological and symmetry-breaking phase transitions. Gain insights into the emergence of quantum anomalous Hall and quantum spin Hall phases as a consequence of these interactions.