biostudies-literaturePeng KUnited States Department of Defense | United States Navy | Office of Naval ResearchUnited States Department of Defense | United States Army | U.S. Army Research, Development and Engineering Command | Army Research OfficeU.S. Department of EnergyGordon and Betty Moore Foundation (Gordon E. and Betty I. Moore Foundation)Nebraska Public Power District through the Nebraska Center for Energy Sciences ResearchErnest S. Kuh Endowed Chair ProfessorshipUnited States Department of Defense | United States Navy | Office of Naval Research (ONR)Gordon and Betty Moore FoundationNational Science Foundation (NSF)United States Department of Defense | United States Army | U.S. Army Research, Development and Engineering Command | Army Research Office (ARO)Canada Research ChairsNational Science Foundation7388https://www.ebi.ac.uk/biostudies/studies/S-EPMC9712507biostudies-literatureUnknown13(1)Quantum fluids exhibit quantum mechanical effects at the macroscopic level, which contrast strongly with classical fluids. Gain-dissipative solid-state exciton-polaritons systems are promising emulation platforms for complex quantum fluid studies at elevated temperatures. Recently, halide perovskite polariton systems have emerged as materials with distinctive advantages over other room-temperature systems for future studies of topological physics, non-Abelian gauge fields, and spin-orbit interactions. However, the demonstration of nonlinear quantum hydrodynamics, such as superfluidity and Čerenkov flow, which is a consequence of the renormalized elementary excitation spectrum, remains elusive in halide perovskites. Here, using homogenous halide perovskites single crystals, we report, in boNature communicationsRoom-temperature polariton quantum fluids in halide perovskites.PMC9712507N00014-22-1-2322W911NF1810149N00014-21-1-20995722DMR-2143041OIA-2044049Kena-Cohen SJin DZhang XBao WTao RHaeberle LLi QFleming GRPeng KfalseRoom-temperature polariton quantum fluids in halide perovskites.Quantum fluids exhibit quantum mechanical effects at the macroscopic level, which contrast strongly with classical fluids. Gain-dissipative solid-state exciton-polaritons systems are promising emulation platforms for complex quantum fluid studies at elevated temperatures. Recently, halide perovskite polariton systems have emerged as materials with distinctive advantages over other room-temperature systems for future studies of topological physics, non-Abelian gauge fields, and spin-orbit interactions. However, the demonstration of nonlinear quantum hydrodynamics, such as superfluidity and Čerenkov flow, which is a consequence of the renormalized elementary excitation spectrum, remains elusive in halide perovskites. Here, using homogenous halide perovskites single crystals, we report, in bo2022-01-01T00:00:00Z2022 Nov2026-06-03T13:20:56.044Z2026-04-28T03:10:16.434ZS-EPMC97125073645071910.1038/s41467-022-34987-y