Vortex stability of interacting Bose-Einstein condensates confined in anisotropic harmonic traps

Details Vortex stability of interacting Bose-Einstein condensates confined in anisotropic harmonic traps Vortex stability of interacting Bose-Einstein condensates confined in anisotropic harmonic traps

1999-04-19

arxiv.org/abs/cond-mat/9904269v1

Physics

Condensed Matter

Statistical Mechanics

5 pages, 2 embedded figures, revtex. To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.82.4956

Vortex states of weakly-interacting Bose-Einstein condensates confined in three-dimensional rotating harmonic traps are investigated numerically at zero temperature. The ground state in the rotating frame is obtained by propagating the Gross-Pitaevskii equation for the condensate in imaginary time. The total energies between states with and without a vortex are compared, yielding critical rotation frequencies that depend on the anisotropy of the trap and the number of atoms. Vortices displaced from the center of nonrotating traps are found to have long lifetimes for sufficiently large numbers of atoms. The relationship between vortex stability and bound core states is explored.

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