Dissipative dynamics of superfluid vortices at nonzero temperatures

Natalia G. Berloff, Anthony J. Youd

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


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
Issue number14
Publication statusPublished - 5 Oct 2007
Externally publishedYes


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