Rapidly rotating Bose-Einstein condensates in an anharmonic confinement

Details Rapidly rotating Bose-Einstein condensates in an anharmonic confinement Rapidly rotating Bose-Einstein condensates in an anharmonic confinement

2005-03-22

arxiv.org/abs/cond-mat/0503541v1

Central European J. Phys. 4(3), 299-309 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Revtex, 5 pages, 2 figures

Scientific paper

10.2478/s11534-006-0013-2

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 $\Omega$ increases and the vortex becomes invisible when $\Omega$ reaches some value.

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