Onset and dynamics of vortex-antivortex pairs in polariton OPO superfluids

Details Onset and dynamics of vortex-antivortex pairs in polariton OPO superfluids Onset and dynamics of vortex-antivortex pairs in polariton OPO superfluids

2011-03-17

arxiv.org/abs/1103.3465v2

Phys. Rev. Lett. 107, 036401 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.107.036401

We study, both theoretically and experimentally, the occurrence of topological defects in polariton superfluids in the optical parametric oscillator (OPO) regime. We explain in terms of local supercurrents the deterministic behaviour of both onset and dynamics of spontaneous vortex-antivortex pairs generated by perturbing the system with a pulsed probe. Using a generalised Gross-Pitaevskii equation, including photonic disorder, pumping and decay, we elucidate the reason why topological defects form in couples and can be detected by direct visualizations in multi-shot OPO experiments.

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