Dissipative dynamics of superfluid vortices at nonzero temperatures

Natalia G. Berloff, Anthony J. Youd

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

We consider the evolution and dissipation of vortex rings in a condensate at nonzero temperatures in the context of the classical field approximation, based on the defocusing nonlinear Schrödinger equation. The temperature in such a system is fully determined by the total number density and the number density of the condensate. The collisions with noncondensed particles reduce the radius of a vortex ring until it completely disappears. We obtain a universal decay law for a vortex line length and relate it to mutual friction coefficients in the fundamental equation of vortex motion in superfluids.

Original languageEnglish
Article number145301
JournalPhysical Review Letters
Volume99
Issue number14
DOIs
Publication statusPublished - 5 Oct 2007
Externally publishedYes

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