Fluctuations and correlations of pure quantum turbulence in superfluid 3He-B

被引：64

作者：

Bradley, D. I. ^{[1
]}

Fisher, S. N. ^{[1
]}

Guenault, A. M. ^{[1
]}

Haley, R. P. ^{[1
]}

O'Sullivan, S. ^{[1
]}

Pickett, G. R. ^{[1
]}

Tsepelin, V. ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 06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.101.065302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe the first measurements of line-density fluctuations and spatial correlations of quantum turbulence in superfluid (3)He-B. All of the measurements are performed in the low-temperature regime, where the normal-fluid density is negligible. The quantum turbulence is generated by a vibrating grid. The vortex-line density is found to have large length-scale correlations, indicating large-scale collective motion of vortices. Furthermore, we find that the power spectrum of fluctuations versus frequency obeys a -5/3 power law which verifies recent speculations that this behavior is a generic feature of fully developed quantum turbulence, reminiscent of the Kolmogorov spectrum for velocity fluctuations in classical turbulence.

引用

页数：4

共 26 条

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