Spontaneous and triggered vortices in polariton OPO superfluids
Mesoscale and Nanoscale Physics
2010-09-10 v1 Quantum Gases
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.
Keywords
Cite
@article{arxiv.1003.5111,
title = {Spontaneous and triggered vortices in polariton OPO superfluids},
author = {F. M. Marchetti and M. H. Szymanska and C. Tejedor and D. M. Whittaker},
journal= {arXiv preprint arXiv:1003.5111},
year = {2010}
}
Comments
5 pages, 4 figures