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Quantum Analogs of Classical Wakes in Bose-Einstein Condensates

Lookup NU author(s): Dr George Stagg, Dr Nicholas Parker, Professor Carlo Barenghi

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Abstract

We show that an elliptical obstacle moving through a Bose–Einstein condensate generates wakes of quantum vortices which resemble those of classical viscous flow past a cylinder or sphere. The role of ellipticity is to facilitate the interaction of the vortices nucleated by the obstacle. Initial steady symmetric wakes lose their symmetry and form clusters of like-signed vortices, in analogy to the classical Bénard–von Kármán vortex street. Our findings, demonstrated numerically in both two and three dimensions, confirm the intuition that a sufficiently large number of quanta of circulation reproduce classical physics.


Publication metadata

Author(s): Stagg GW, Parker NG, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Year: 2014

Volume: 47

Issue: 9

Print publication date: 15/05/2014

Online publication date: 16/04/2014

Acceptance date: 25/03/2014

ISSN (print): 0953-4075

ISSN (electronic): 1361-6455

Publisher: Institute of Physics Publishing Ltd

URL: http://dx.doi.org/10.1088/0953-4075/47/9/095304

DOI: 10.1088/0953-4075/47/9/095304


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