Quantum nucleation of vortices in the flow of superfluid 4He through an orifice

G. G. Ihas*, O. Avenel, R. Aarts, R. Salmelin, E. Varoquaux

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

58 Citations (Scopus)
2 Downloads (Pure)

Abstract

Flow measurements in ultrapure He4 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 He4 and strongly suggest that the underlying mechanism, the nucleation of vortex half-rings, is identical.

Original languageEnglish
Pages (from-to)327-330
Number of pages4
JournalPhysical Review Letters
Volume69
Issue number2
DOIs
Publication statusPublished - Jul 1992
MoE publication typeA1 Journal article-refereed

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