Metastability of persistent currents in trapped gases of atoms

Details Metastability of persistent currents in trapped gases of atoms Metastability of persistent currents in trapped gases of atoms

2007-09-04

arxiv.org/abs/0709.0405v1

Phys. Rev. A 76 (2007) 043627

Physics

Condensed Matter

Other Condensed Matter

7 pages, RevTex, 5 figures

Scientific paper

10.1103/PhysRevA.76.043627

We examine the conditions that give rise to metastable, persistent currents in a trapped Bose-Einstein condensate. A necessary condition for the stability of persistent currents is that the trapping potential is not a monotonically increasing function of the distance from the trap center. Persistent currents also require that the interatomic interactions are sufficiently strong and repulsive. Finally, any off-center vortex state is shown to be unstable, while a driven gas shows hysteresis.

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