Dissipative Dynamics of Superfluid Vortices at Nonzero Temperatures
Journal Article
·
· Physical Review Letters
- Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, CB3 0WA (United Kingdom)
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 Schroedinger 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.
- OSTI ID:
- 21024240
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.99.145301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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