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- W4386770160 abstract "We develop a semianalytical description for the Berezinskii-Kosterlitz-Thouless--like phase transition in nonequilibrium Bose-Einstein condensates. Our theoretical analysis is based on a noisy generalized Gross-Pitaevskii equation. Above a critical strength of the noise, spontaneous vortex-antivortex pairs are generated. We provide a semianalytical determination of the transition point based on a linearized Bogoliubov analysis, to which some nonlinear corrections are added. We present two different approaches that are in agreement with our numerical calculations in a wide range of system parameters. We find that for small losses and not too small energy relaxation the critical point approaches that of the equilibrium Berezinskii-Kosterlitz-Thouless transition. Furthermore, we find that losses tend to stabilize the ordered phase: keeping the other parameters constant and increasing the losses leads to a higher critical noise strength for the spontaneous generation of vortex-antivortex pairs. Our theoretical analysis is relevant for experiments on microcavity polaritons." @default.
- W4386770160 created "2023-09-16" @default.
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- W4386770160 date "2023-09-15" @default.
- W4386770160 modified "2023-09-28" @default.
- W4386770160 title "Noise-induced transition from superfluid to vortex state in two-dimensional nonequilibrium polariton condensates: Semianalytical treatment" @default.
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- W4386770160 doi "https://doi.org/10.1103/physrevb.108.094510" @default.
- W4386770160 hasPublicationYear "2023" @default.
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