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arXiv · 1003.5111

Spontaneous and triggered vortices in polariton OPO superfluids

F. M. Marchetti·M. H. Szymanska·C. Tejedor·D. M. Whittaker
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Abstract

We study non-equilibrium polariton superfluids in the optical parametric oscillator (OPO) regime using a two-component Gross-Pitaevskii equation with pumping and decay. We identify a regime above OPO threshold, where the system undergoes spontaneous symmetry breaking and is unstable towards vortex formation without any driving rotation. Stable vortex solutions differ from metastable ones; the latter can persist in OPO superfluids but can only be triggered externally. Both spontaneous and triggered vortices are characterised by a generalised healing length, specified by the OPO parameters only.

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F. M. Marchetti, M. H. Szymanska, C. Tejedor, D. M. Whittaker. 2010-03-26. Spontaneous and triggered vortices in polariton OPO superfluids. https://doi.org/10.1103/physrevlett.105.063902

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