Publication
Title
Noise-induced transition from superfluid to vortex state in two-dimensional nonequilibrium polariton condensates : semianalytical treatment
Author
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 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.
Language
English
Source (journal)
Physical review B / American Physical Society. - New York, N.Y, 2016, currens
Publication
New York, N.Y : American Physical Society , 2023
ISSN
2469-9969 [online]
2469-9950 [print]
DOI
10.1103/PHYSREVB.108.094510
Volume/pages
108 :9 (2023) , p. 1-9
Article Reference
094510
ISI
001130433200007
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
Polaronic effects in superfluid Fermi gases.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 01.02.2024
Last edited 07.02.2024
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