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Vortex nucleation by collapsing bubbles in Bose-Einstein condensates

Lookup NU author(s): Professor Carlo Barenghi

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Abstract

Nucleation of vortex rings accompanies the collapse of ultrasound bubbles in superfluids. Using the Gross-Pitaevskii equation for a uniform condensate we elucidate the various stages of the collapse of a stationary spherically symmetric bubble and establish conditions necessary for vortex nucleation. The minimum radius of the stationary bubble, whose collapse leads to vortex nucleation, was found to be 28+/-1 healing lengths. The time after which the nucleation becomes possible is determined as a function of the bubble's radius. We show that vortex nucleation takes place in moving bubbles of even smaller radius if the motion makes them sufficiently oblate.

Publication metadata

Author(s): Berloff NG, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Physical Review Letters

Year: 2004

Volume: 93

Issue: 9

Pages: -

ISSN (print): 0031-9007

ISSN (electronic): 1079-7114

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevLett.93.090401

DOI: 10.1103/PhysRevLett.93.090401

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