Quasiclassical and ultraquantum decay of superfluid turbulence

Details Quasiclassical and ultraquantum decay of superfluid turbulence Quasiclassical and ultraquantum decay of superfluid turbulence

2011-11-15

arxiv.org/abs/1111.3626v2

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

This letter addresses the 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 lengthscale, e.g. by the beam of vortex rings in the experiment of Walmsley and Golov [Phys. Rev. Lett. {\bf 100}, 245301 (2008)], we explained the mechanisms of generation of both ultraquantum and quasiclassical regimes. We also found that the anisotropy of the beam is important for generating the large scale motion associated with the quasiclassical regime.

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