Marchetti, F. M., Szymanska, M. H. (Marzena H.), Tejedor, C. and Whittaker, D. M.. (2010) Spontaneous and triggered vortices in polariton optical-parametric-oscillator superfluids. Physical Review Letters, Vol.105 (No.6). Article: 063902. ISSN 0031-9007

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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.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Official Date:	4 August 2010
Dates:	Date Event 4 August 2010 Published
Volume:	Vol.105
Number:	No.6
Number of Pages:	4
Page Range:	Article: 063902
Identification Number:	10.1103/PhysRevLett.105.063902
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Spanish MEC, CAM
Grant number:	MAT2008-01555, QOIT-CSD2006-00019, S-2009/ESP-1503
URI:	http://wrap.warwick.ac.uk/id/eprint/5406

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