Rapidly rotating Bose-Einstein condensates in an anharmonic confinement
arXiv:cond-mat/0503541 · doi:10.2478/s11534-006-0013-2
Abstract
We examine a rapidly rotating Bose-Einstein condensate in an anharmonic confinement and find that many properties such as the critical rotating frequency and phase diagram are quite different from those in a harmonic trap. We investigate the phase transitions by means of average-vortex-approximation. We find that the vortex lattice consists of a vortex array with a hole in the center of the cloud as the rotating frequency increases and the vortex becomes invisible when reaches some value.
Revtex, 5 pages, 2 figures
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