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arXiv · 1404.4557

Vortex reconnections in atomic condensates at finite temperature

A. J. Allen·S. Zuccher·M. Caliari·N. P. Proukakis·N. G. Parker·C. F. Barenghi
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Abstract

The study of vortex reconnections is an essential ingredient of understanding superfluid turbulence, a phenomenon recently also reported in trapped atomic Bose-Einstein condensates. In this work we show that, despite the established dependence of vortex motion on temperature in such systems, vortex reconnections are actually temperature independent on the typical length/time scales of atomic condensates. Our work is based on a dissipative Gross-Pitaevskii equation for the condensate, coupled to a semiclassical Boltzmann equation for the thermal cloud (the Zaremba-Nikuni-Griffin formalism). Comparison to vortex reconnections in homogeneous condensates further show reconnections to be insensitive to the inhomogeneity in the background density.

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A. J. Allen, S. Zuccher, M. Caliari, N. P. Proukakis, N. G. Parker, C. F. Barenghi. 2014-05-27. Vortex reconnections in atomic condensates at finite temperature. https://doi.org/10.1103/physreva.90.013601

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