Journal
PHYSICAL REVIEW LETTERS
Volume 100, Issue 25, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.100.250401
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Funding
- EPSRC [EP/G004714/1, EP/D032407/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D032407/1, EP/G004714/1] Funding Source: researchfish
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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.
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