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Classical-like wakes past elliptical obstacles in atomic Bose-Einstein condensates

Lookup NU author(s): Dr George Stagg, Dr Joy Allen, Professor Carlo Barenghi, Dr Nick Parker

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


Abstract

We reinvestigate numerically the classic problem of two-dimensional superfluid flow past an obstacle. Taking the obstacle to be elongated (perpendicular to the flow), rather than the usual circular form, is shown to promote the nucleation of quantized vortices, enhance their subsequent interactions, and lead to wakes which bear striking similarity to their classical (viscous) counterparts. Then, focussing on the recent experiment of Kwon et al. (arXiv:1403.4658) in a trapped condensate, we show that an elliptical obstacle leads to a cleaner and more efficient means to generate two-dimensional quantum turbulence.


Publication metadata

Author(s): Stagg GW, Allen AJ, Barenghi CF, Parker NG

Publication type: Article

Publication status: Published

Journal: Journal of Physics: Conference Series

Year: 2015

Volume: 594

Online publication date: 25/03/2015

Acceptance date: 25/03/2015

Date deposited: 01/05/2015

ISSN (print): 1742-6588

ISSN (electronic): 1742-6596

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1088/1742-6596/594/1/012044

DOI: 10.1088/1742-6596/594/1/012044

Notes: 23rd International Laser Physics Workshop (LPHYS’14), 14–18 July 2014, Sofia, Bulgaria


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