Spontaneous rotating vortex lattices in a pumped decaying condensate

Jonathan Mark James Keeling, Natalia G. Berloff

Research output: Contribution to journalArticlepeer-review

254 Citations (Scopus)

Abstract

Injection and decay of particles in an inhomogeneous quantum condensate can significantly change its behavior. We model trapped, pumped, decaying condensates by a complex Gross-Pitaevskii equation and analyze the density and currents in the steady state. With homogeneous pumping, rotationally symmetric solutions are unstable. Stability may be restored by a finite pumping spot. However if the pumping spot is larger than the Thomas-Fermi cloud radius, then rotationally symmetric solutions are replaced by solutions with spontaneous arrays of vortices. These vortex arrays arise without any rotation of the trap, spontaneously breaking rotational symmetry.

Original languageEnglish
Article number250401
Number of pages4
JournalPhysical Review Letters
Volume100
Issue number25
DOIs
Publication statusPublished - 27 Jun 2008

Keywords

  • BOSE-EINSTEIN CONDENSATION
  • COUPLED QUANTUM-WELLS
  • COLD EXCITON GASES
  • PATTERN-FORMATION
  • POLARITONS
  • EQUILIBRIUM
  • MICROCAVITY
  • MAGNONS

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