Lookup NU author(s): Dr Andrew Baggaley,
Dr Nicholas Parker
This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Physical Society, 2018.
For re-use rights please refer to the publisher's terms and conditions.
We demonstrate an experimentally feasible method for generating the classical Kelvin-Helmholtz instability in a single-component atomic Bose-Einstein condensate. By progressively reducing a potential barrier between two counterflowing channels, we seed a line of quantized vortices, which precede to form progressively larger clusters, mimicking the classical roll-up behavior of the Kelvin-Helmholtz instability. This cluster formation leads to an effective superfluid shear layer, formed through the collective motion of many quantized vortices. From this we demonstrate a straightforward method to measure the effective viscosity of a turbulent quantum fluid in a system with a moderate number of vortices, within the range of current experimental capabilities.
Author(s): Baggaley AW, Parker NG
Publication type: Article
Publication status: Published
Journal: Physical Review A
Online publication date: 14/05/2018
Acceptance date: 14/05/2018
ISSN (print): 2469-9926
ISSN (electronic): 2469-9934
Publisher: American Physical Society
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