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
收藏
页码：327 / 330
页数：4
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