Vortex reconnections in atomic condensates at finite temperature

A. J. Allen, S. Zuccher, M. Caliari, N. P. Proukakis, N. G. Parker, and C. F. Barenghi
Phys. Rev. A 90, 013601 – Published 2 July 2014

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 and 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 shows reconnections to be insensitive to the inhomogeneity in the background density.

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  • Received 27 May 2014

DOI:https://doi.org/10.1103/PhysRevA.90.013601

©2014 American Physical Society

Authors & Affiliations

A. J. Allen1,*, S. Zuccher2, M. Caliari2, N. P. Proukakis1, N. G. Parker1, and C. F. Barenghi1

  • 1Joint Quantum Centre (JQC) Durham-Newcastle, School of Mathematics and Statistics, Newcastle University, Newcastle upon Tyne NE1 7RU, England, United Kingdom
  • 2Dipartimento di Informatica, Università di Verona, Ca' Vignal 2, Strada Le Grazie 15, 37134 Verona, Italy

  • *joy.allen@ncl.ac.uk

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Vol. 90, Iss. 1 — July 2014

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