Inverse energy cascade in forced two-dimensional quantum turbulence

Reeves, Matthew T., Billam, Thomas P., Anderson, Brian P. and Bradley, Ashton S. (2013) Inverse energy cascade in forced two-dimensional quantum turbulence. Physical Review Letters, 110 10: . doi:10.1103/PhysRevLett.110.104501

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Author Reeves, Matthew T.
Billam, Thomas P.
Anderson, Brian P.
Bradley, Ashton S.
Title Inverse energy cascade in forced two-dimensional quantum turbulence
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
1079-7114
Publication date 2013-03-08
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.110.104501
Open Access Status File (Publisher version)
Volume 110
Issue 10
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract We demonstrate an inverse energy cascade in a minimal model of forced 2D quantum vortex turbulence. We simulate the Gross-Pitaevskii equation for a moving superfluid subject to forcing by a stationary grid of obstacle potentials, and damping by a stationary thermal cloud. The forcing injects large amounts of vortex energy into the system at the scale of a few healing lengths. A regime of forcing and damping is identified where vortex energy is efficiently transported to large length scales via an inverse energy cascade associated with the growth of clusters of same-circulation vortices, a Kolmogorov scaling law in the kinetic energy spectrum over a substantial inertial range, and spectral condensation of kinetic energy at the scale of the system size. Our results provide clear evidence that the inverse energy cascade phenomenon, previously observed in a diverse range of classical systems, can also occur in quantum fluids.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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Created: Mon, 12 Jun 2017, 11:20:25 EST by Matt Reeves on behalf of Learning and Research Services (UQ Library)