Giant hole and circular superflow in a fast rotating Bose-Einstein condensate

Abstract

A fast rotating Bose-Einstein condensate confined in a quadratic-plus-quartic potential is found to dynamically generate a "giant vortex" that absorbs all phase singularities into a central low density hole, thereby sustaining a quasi-one-dimensional circular superflow at a supersonic speed.

4 pages, 4 figures, revtex4

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