Phys. Rev. Lett. 79, 2164–2167 (1997)Vortex Stability and Persistent Currents in Trapped Bose GasesReceived 21 May 1997; published in the issue dated 22 September 1997 We consider the stability of vortices in trapped dilute Bose gases. For weak coupling the vortex is unstable to single-particle excitations: the Bose condensate cannot support persistent currents, and the gas is not superfluid. For stronger coupling the azimuthal symmetry of the rotating condensate is spontaneously broken, resulting in an off-center vortex that eventually spirals out of the trap. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.2164
DOI:
10.1103/PhysRevLett.79.2164
PACS:
03.75.Fi, 05.30.Jp, 32.80.Pj
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