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Characteristics of two-dimensional quantum turbulence in a compressible superfluid
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Neely, T., Bradley, A., Samson, E., Rooney, S., Wright, E., Law, K. J. H., Carretero-González, R., Kevrekidis, P., Davis, M. and Anderson, B. (2013) Characteristics of two-dimensional quantum turbulence in a compressible superfluid. Physical Review Letters, Volume 111 (Number 23). Article number 235301 . doi:10.1103/PhysRevLett.111.235301 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.111.235301
Abstract
Fluids subjected to suitable forcing will exhibit turbulence, with characteristics strongly affected by the fluid’s physical properties and dimensionality. In this work, we explore two-dimensional (2D) quantum turbulence in an oblate Bose-Einstein condensate confined to an annular trapping potential. Experimentally, we find conditions for which small-scale stirring of the condensate generates disordered 2D vortex distributions that dissipatively evolve toward persistent currents, indicating energy transport from small to large length scales. Simulations of the experiment reveal spontaneous clustering of same-circulation vortices and an incompressible energy spectrum with k−5/3 dependence for low wave numbers k. This work links experimentally observed vortex dynamics with signatures of 2D turbulence in a compressible superfluid.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 2013 | ||||
Dates: |
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Volume: | Volume 111 | ||||
Number: | Number 23 | ||||
Number of Pages: | 6 | ||||
Page Range: | Article number 235301 | ||||
DOI: | 10.1103/PhysRevLett.111.235301 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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