Observation of vortex phase singularities in Bose-Einstein condensates

Abstract

We have observed phase singularities due to vortex excitation in Bose-Einstein condensates. Vortices were created by moving a laser beam through a condensate. They were observed as dislocations in the interference fringes formed by the stirred condensate and a second unperturbed condensate. The velocity dependence for vortex excitation and the time scale for re-establishing a uniform phase across the condensate were determined.

4 pages, 5 figures

References in corpus (1)

• Watching dark solitons decay into vortex rings in a Bose-Einstein condensate

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