Spontaneous rotating vortex lattices in a pumped decaying condensate

Details Spontaneous rotating vortex lattices in a pumped decaying condensate Spontaneous rotating vortex lattices in a pumped decaying condensate

2007-06-25

arxiv.org/abs/0706.3686v3

Phys. Rev. Lett. 100, 250401 (2008)

Physics

Condensed Matter

Other Condensed Matter

Updated title and introduction. 4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.100.250401

Injection and decay of particles in an inhomogeneous quantum condensate can significantly change its behaviour. We model trapped, pumped, decaying condensates by a complex Gross-Pitaevskii equation and analyse 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.

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