Vortex formation in a slowly rotating Bose-Einstein condensate confined in a magnetic-plus-laser trap potential

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  • 3 February 2004
Abstract
Motivated by the recent experiment at ENS [ V. Bretin, S. Stock, Y. Seurin and, J. Dalibard, cond-mat/0307464], we study a rotating (non-)interacting atomic Bose-Einstein condensate confined in a magnetic-plus-laser trap potential. By adjusting the amplitude of the laser potential, one can make quadratic-plus-quartic potential as well as {\em quartic-minus-quadratic} potential. We show that an interacting Bose-Einstein condensate confined in a magnetic-plus-laser trap breaks the rotational symmetry of the Hamiltonian when rotational frequency is greater than one-half of the quadrupole mode frequency. We also show that by increasing the amplitude of the laser trap, a vortex appears in a slowly rotating Bose-Einstein condensate. Moreover, one can also create a vortex in non-interacting Bose-Einstein condensate confined in magnetic-plus-laser potential.

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