Lookup NU author(s): Dr Angela White,
Professor Carlo Barenghi,
Professor Nikolaos Proukakis,
Dr Anthony Youd,
Dr Daniel Wacks
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In a recent experiment Paoletti et al. [Phys. Rev. Lett. 101, 154501 (2008)] monitored the motion of tracer particles in turbulent superfluid helium and inferred that the velocity components do not obey the Gaussian statistics observed in ordinary turbulence. Motivated by their experiment, we create a small 3D turbulent state in an atomic Bose-Einstein condensate, compute directly the velocity field, and find similar nonclassical power-law tails. We obtain similar results in 2D trapped and 3D homogeneous condensates, and in classical 2D vortex points systems. This suggests that non-Gaussian turbulent velocity statistics describe a fundamental property of quantum turbulence. We also track the decay of the vortex tangle in the presence of the thermal cloud.
Author(s): White AC, Barenghi CF, Proukakis NP, Youd AJ, Wacks DH
Publication type: Article
Publication status: Published
Journal: Physical Review Letters
Print publication date: 01/02/2010
ISSN (print): 0031-9007
ISSN (electronic): 1079-7114
Publisher: American Physical Society
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