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Vortex reconnections in atomic condensates at finite temperature

Lookup NU author(s): Dr Joy AllenORCiD, Professor Nikolaos ProukakisORCiD, Professor Nick ParkerORCiD, Professor Carlo 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 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.

Publication metadata

Author(s): Allen AJ, Zuccher S, Caliari M, Proukakis NP, Parker NG, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Physical Review A

Year: 2014

Volume: 90

Issue: 1

Print publication date: 01/07/2014

Online publication date: 02/07/2014

ISSN (print): 1050-2947

ISSN (electronic): 1094-1622

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevA.90.013601

DOI: 10.1103/PhysRevA.90.013601

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