Stationary states of a rotating Bose-Einstein condensate: routes to vortex nucleation

Details Stationary states of a rotating Bose-Einstein condensate: routes to vortex nucleation Stationary states of a rotating Bose-Einstein condensate: routes to vortex nucleation

2001-01-04

arxiv.org/abs/cond-mat/0101051v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 eps figures

Scientific paper

10.1103/PhysRevLett.86.4443

Using a focused laser beam we stir a $^{87}$Rb Bose-Einstein condensate confined in a magnetic trap. We observe that the steady states of the condensate correspond to an elliptic cloud, stationary in the rotating frame. These steady states depend nonlinearly on the stirring parameters (amplitude and frequency), and various solutions can be reached experimentally depending on the path followed in this parameter space. These states can be dynamically unstable and we observe that such instabilities lead to vortex nucleation in the condensate.

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