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.
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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-pp.ucl.ac.uk/id/eprint/1398718 |
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