Second Thresholds in BEC-BCS-Laser Crossover of Exciton-Polariton Systems
Second Thresholds in BEC-BCS-Laser Crossover of Exciton-Polariton Systems
The mechanism of second thresholds observed in several experiments is theoretically revealed by studying the BEC-BCS-laser crossover in exciton-polariton systems. We find that there are two different types of second thresholds: one is a crossover within quasiequilibrium phases and the other is into nonequilibrium (lasing). In both cases, the light-induced …