Vortex Formation by Interference of Multiple Trapped Bose-Einstein Condensates
arXiv:cond-mat/0610187 · doi:10.1103/PhysRevLett.98.110402
Abstract
We report observations of vortex formation as a result of merging together multiple Rb Bose-Einstein condensates (BECs) in a confining potential. In this experiment, a trapping potential is partitioned into three sections by a barrier, enabling the simultaneous formation of three independent, uncorrelated condensates. The three condensates then merge together into one BEC, either by removal of the barrier, or during the final stages of evaporative cooling if the barrier energy is low enough; both processes can naturally produce vortices within the trapped BEC. We interpret the vortex formation mechanism as originating in interference between the initially independent condensates, with indeterminate relative phases between the three initial condensates and the condensate merging rate playing critical roles in the probability of observing vortices in the final, single BEC.
5 pages, 3 figures
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