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Lookup NU author(s): Nick Keepfer,
Dr George Stagg,
Dr Luca Galantucci,
Professor Carlo Barenghi,
Dr Nick Parker
This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Physical Society, 2020.
For re-use rights please refer to the publisher's terms and conditions.
We study numerically the formation of a vortex lattice inside a rotating bucket containing superfluid helium, paying attention to an important feature which is practically unavoidable in all experiments: the microscopic roughness of the bucket's surface. We model this using the Gross-Pitaevskii equation for a weakly interacting Bose gas, a model which is idealized when applied to superfluid helium but captures the key physics of the vortex dynamics which we are interested in. We find that the vortex lattice arises from the interaction and reconnections of nucleated U-shaped vortex lines, which merge and align along the axis of rotation. We quantify the effects which the surface roughness and remanent vortex lines play in this process.
Author(s): Keepfer NA, Stagg GW, Galantucci L, Barenghi CF, Parker NG
Publication type: Article
Publication status: Published
Journal: Physics Review B
Print publication date: 01/10/2020
Online publication date: 21/10/2020
Acceptance date: 06/10/2020
Date deposited: 26/10/2020
ISSN (print): 2469-9950
ISSN (electronic): 2469-9969
Publisher: American Physical Society
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