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Spontaneous and triggered vortices in polariton OPO superfluids

Marchetti, FM; Szymanska, MH; Tejedor, C; Whittaker, DM; (2010) Spontaneous and triggered vortices in polariton OPO superfluids. Physical Review Letters , 105 (6) , Article 063902. 10.1103/PhysRevLett.105.063902. Green open access

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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.

Type: Article
Title: Spontaneous and triggered vortices in polariton OPO superfluids
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.105.063902
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.105.063902
Language: English
Additional information: © 2010 The American Physical Society. 5 pages, 4 figures
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/1398718
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