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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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.
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
Publisher: Institute of Physics Publishing Ltd.
Library holdings: Search Newcastle University Library for this item
Series Title: Journal of Physics Conference Series