| Autor: |
Berloff NG; Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, UK., Youd AJ |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2007 Oct 05; Vol. 99 (14), pp. 145301. Date of Electronic Publication: 2007 Oct 05. |
| DOI: |
10.1103/PhysRevLett.99.145301 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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