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Title
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Noise-induced transition from superfluid to vortex state in two-dimensional nonequilibrium polariton condensates : semianalytical treatment
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Author
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Abstract
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| 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 GrossPitaevskii 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. |
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Language
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English
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Source (journal)
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Physical review B / American Physical Society. - New York, N.Y, 2016, currens
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Publication
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New York, N.Y
:
American Physical Society
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2023
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ISSN
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2469-9969
[online]
2469-9950
[print]
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DOI
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10.1103/PHYSREVB.108.094510
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Volume/pages
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108
:9
(2023)
, p. 1-9
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Article Reference
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094510
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ISI
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001130433200007
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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