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Turbulence in a Bose-Einstein condensate

Lookup NU author(s): Dr Angela White, Professor Nikolaos Proukakis, Dr Anthony Youd, Dr Daniel Wacks, Dr Andrew Baggaley, Professor Carlo Barenghi

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Abstract

We numerically model turbulence in a trapped atomic Bose-Einstein condensate by solving the Gross-Pitaevskii nonlinear Schroedinger equation. We find that, after an initial growth, the vortex length decays approximately as t(-1) where t is time, consistent with experiments in turbulent superfluid helium, and that the velocity components obey power-law statistics, again in agreement with observations in turbulent superfluid helium. We find the same statistics, which contrasts to the Gaussian statistics observed in ordinary classical turbulence, in a variety of quantum fluids in two and three dimensions (trapped condensates, homogeneous condensates, vortex points, vortex filaments). We argue that the non-Gaussianity arises from the singular nature of quantised vorticity.


Publication metadata

Author(s): White AC, Proukakis NP, Youd AJ, Wacks DH, Baggaley AW, Barenghi CF

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: 3th European Turbulence Conference (ETC): Vorticity Dynamics

Year of Conference: 2011

Pages: Article no: 062003

ISSN: 1742-6588

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1088/1742-6596/318/6/062003

DOI: 10.1088/1742-6596/318/6/062003

Library holdings: Search Newcastle University Library for this item

Series Title: Journal of Physics Conference Series

ISBN: 17426596


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