Shape deformations and angular momentum transfer in trapped Bose-Einstein condensates

Details Shape deformations and angular momentum transfer in trapped Bose-Einstein condensates Shape deformations and angular momentum transfer in trapped Bose-Einstein condensates

2000-09-13

arxiv.org/abs/cond-mat/0009187v1

Physics

Condensed Matter

4 pages revtex, 2 figures included

Scientific paper

10.1103/PhysRevA.63.011601

Angular momentum can be transferred to a trapped Bose-Einstein condensate by distorting its shape with an external rotating field, provided the rotational frequency is larger than a critical frequency fixed by the energy and angular momentum of the excited states of the system. By using the Gross-Pitaevskii equation and sum rules, we explore the dependence of such a critical frequency on the multipolarity of the excitations and the asymmetry of the confining potential. We also discuss its possible relevance for vortex nucleation in rotating traps.

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