QUANTUM NUCLEATION OF VORTICES IN THE FLOW OF SUPERFLUID HE-4 THROUGH AN ORIFICE

被引：61

作者：

IHAS, GG

AVENEL, O

AARTS, R

SALMELIN, R

VAROQUAUX, E

机构：

[1] UNIV PARIS 11, PHYS SOLIDES LAB, F-91405 ORSAY, FRANCE

[2] UNIV FLORIDA, DEPT PHYS, GAINESVILLE, FL 32611 USA

[3] EINDHOVEN UNIV TECHNOL, DEPT PHYS, 5600 MB EINDHOVEN, NETHERLANDS

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.69.327

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Flow measurements in ultrapure He-4 through a micron-size orifice at millikelvin temperatures show, for the first time, the transition from thermal to quantum nucleation of nanometer-size vortices below a crossover temperature of 0.147 K. These observations establish the close relationship between this type of critical flow and negative-ion motion in superfluid 4He and strongly suggest that the underlying mechanism, the nucleation of vortex half rings, is identical.

引用

页码：327 / 330

页数：4

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