Marchetti, FM;
Szymańska, MH;
Tejedor, C;
Whittaker, DM;
(2010)
Spontaneous and triggered vortices in polariton optical-parametric- oscillator superfluids.
Physical Review Letters
, 105
(6)
, Article 063902. 10.1103/PhysRevLett.105.063902.
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Abstract
We study nonequilibrium polariton superfluids in the optical-parametric-oscillator regime by using a Gross-Pitaevskii equation with pumping and decay. We identify a regime above the optical-parametric-oscillator threshold, where the system undergoes spontaneous symmetry breaking and is unstable towards vortex formation without any rotating drive. Stable vortex solutions differ from metastable ones; the latter can persist but can be triggered only externally. Both spontaneous and triggered vortices are characterized by a generalized healing length, specified by the optical-parametric-oscillator parameters only.
| Type: | Article |
|---|---|
| Title: | Spontaneous and triggered vortices in polariton optical-parametric- oscillator 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 |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1398716 |
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