Vortex nucleation in Bose-Einstein Condensates subject to light induced effective magnetic fields

Details Vortex nucleation in Bose-Einstein Condensates subject to light induced effective magnetic fields Vortex nucleation in Bose-Einstein Condensates subject to light induced effective magnetic fields

2007-09-06

arxiv.org/abs/0709.0895v1

Physics

Condensed Matter

Other Condensed Matter

7 pages, 7 figures

Scientific paper

We numerically simulate vortex nucleation in a Bose-Einstein Condensate (BEC) subject to an effective magnetic field. The effective magnetic field is generated from the interplay between light with a non-trivial phase structure and the BEC, and can be shaped and controlled by appropriate modifications to the phase and intensity of the light. We demonstrate that the nucleation of vortices is seeded by instabilities in surface excitations which are coupled to by an asymmetric trapping potential (similar to the case of condensates subject to mechanical rotation) and show that this picture also holds when the applied effective magnetic field is not homogeneous. The eventual configuration of vortices in the cloud depends on the geometry of the applied field.

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