Physicists have developed a new photonic system with electrically tuned topological features
https://phys.org/news/2022-10-physicists-photonic-electrically-tuned-topological.html
"perovskites information processing high energy efficiency... excitons... two-dimensional perovskite... coupled with photons trapped in two-dimensional optical cavity filled with liquid crystal... phase transition to non-equilibrium Bose-Einstein condensate... superfluid room temperature... strong light... photonic energy bands with non-zero Berry curvature... optical spin-orbit effects... twist liquid crystal molecules at surface of mirrors... topological energy bands in ultracold atomic gasses and photonics"
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