Dissipative dynamics of superfluid vortices at nonzero temperatures

被引：49

作者：

Berloff, Natalia G. ^{[1
]}

Youd, Anthony J. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, England

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 14期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.145301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 Schrodinger 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.

引用

页数：4

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