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Quasiclassical and ultraquantum decay of superfluid turbulence

Lookup NU author(s): Dr Andrew BaggaleyORCiD, Professor Carlo Barenghi, Emeritus Professor Yuri Sergeev

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Abstract

We address a question which, after a decade-long discussion, still remains open: what is the nature of the ultraquantum regime of decay of quantum turbulence? The model developed in this work reproduces both the ultraquantum and the quasiclassical decay regimes and explains their hydrodynamical natures. In the case where turbulence is generated by forcing at some intermediate length scale, e.g., by the beam of vortex rings in the experiment of Walmsley and Golov [Phys. Rev. Lett. 100, 245301 (2008).], we explain the mechanisms of generation of both ultraquantum and quasiclassical regimes. We also find that the anisotropy of the beam is important for generating the large-scale motion associated with the quasiclassical regime.

Publication metadata

Author(s): Baggaley AW, Barenghi CF, Sergeev YA

Publication type: Article

Publication status: Published

Journal: Physical Review B

Year: 2012

Volume: 85

Issue: 6

Print publication date: 03/02/2012

Date deposited: 11/04/2012

ISSN (print): 1098-0121

ISSN (electronic): 1550-235X

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevB.85.060501

DOI: 10.1103/PhysRevB.85.060501

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