VORTEX DYNAMICS AND SUPERFLUID RELAXATION NEAR THE HE-4 LAMBDA-TRANSITION

被引：21

作者：

WILLIAMS, GA

机构：

[1] Department of Physics, University of California, Los Angeles

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.71.392

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The superfluid relaxation time near the He-4 lambda transition is calculated using a vortex-ring theory of the phase transition. The diffusive response of the vortices is found by solving the Fokker-Planck equation, and the resulting relaxation time at low frequencies is in agreement with Landau-Khalatnikov theory and with dynamic scaling. At higher frequencies there is a deviation from the Landau-Khalatnikov form, with both the dissipation and superfluid density remaining finite at T(lambda) as the transition broadens at finite frequency.

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页码：392 / 395

页数：4

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