Vortex unbinding transition in nonequilibrium photon condensates
Vladimir N. Gladilin, Michiel Wouters
TL;DR
This paper theoretically investigates a phase transition similar to the BKT transition in nonequilibrium photon condensates, providing an analytical formula for the critical point and analyzing stability under driving and dissipation.
Contribution
It introduces an analytical formula for the critical point of a BKT-like transition in nonequilibrium photon condensates, validated by numerical simulations.
Findings
Ordered phase stability increases with driving and dissipation.
The analytical formula accurately captures the critical point.
Numerical simulations support the theoretical predictions.
Abstract
We present a theoretical study of a Berezinskii-Kosterlitz-Thouless like phase transition in lattices of nonequilibrium photon condensates. Starting from linearized fluctuation theory and the properties of vortices, we propose an analytical formula for the critical point containing four fitting parameters, that captures well all our numerical simulations. We find that the ordered phase becomes more stable when driving and dissipation is increased.
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