Creating and controlling macroscopic quantum states in solid-state materials have significant potential in developing quantum applications. Typical examples are superconductivity, Bose-Einstein condensation, and superfluorescence. Among these processes, superfluorescence provides a unique opportunity to monitor the evolution of an initially incoherent population of electronic excitations into macroscopic coherence in real-time. Recently we observed superfluorescence in lead halide perovskites at unprecedently high temperatures. In this talk, I will present time-resolved spectroscopic studies of the emergence of superfluorescence in perovskites, explaining the critical role of lattice dynamics in enabling this exotic quantum effect at unprecedentedly high temperatures.
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