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Topological stirring of two-dimensional atomic Bose-Einstein condensates

Lookup NU author(s): Dr Angela White, Professor Nikolaos Proukakis, Professor Carlo Barenghi

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

© Published under licence by IOP Publishing Ltd. We stir vortices into a trapped quasi two-dimensional atomic Bose-Einstein condensate by moving three laser stirrers. We apply stirring protocols introduced by Boyland et al. (2000), that efficiently build in topological chaos in classical fluids and are classified as Pseudo-Anosov stirring protocols. These are compared to their inefficient mixing counterparts, finite-order stirring protocols. We investigate if inefficient stirring protocols result in a more clustered distribution of vortices. The efficiency with which vortices are 'mixed' or distributed in a condensate is important for investigating dynamics of continuously forced quantum turbulence and the existence of the inverse cascade in turbulent two-dimensional superfluids.


Publication metadata

Author(s): White AC, Proukakis NP, Barenghi CF

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Quantised Flux in Tightly Knotted and Linked Systems

Year of Conference: 2012

Online publication date: 20/10/2014

Date deposited: 31/08/2017

ISSN: 1742-6588

Publisher: Institute of Physics Publishing

URL: https://doi.org/10.1088/1742-6596/544/1/012021

DOI: 10.1088/1742-6596/544/1/012021


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