Lookup NU author(s): Dr Joy Allen,
Professor Nikolaos Proukakis,
Dr Nick Parker,
Professor Carlo Barenghi
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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.
Author(s): Allen AJ, Zuccher S, Caliari M, Proukakis NP, Parker NG, Barenghi CF
Publication type: Article
Publication status: Published
Journal: Physical Review A
Print publication date: 01/07/2014
Online publication date: 02/07/2014
ISSN (print): 1050-2947
ISSN (electronic): 1094-1622
Publisher: American Physical Society
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