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On the approach to criticality of a vibrating, macroscopic object in superfluid 3HeB

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>08/1990
<mark>Journal</mark>Physica B: Condensed Matter
Issue number1
Number of pages2
Pages (from-to)653-654
<mark>Original language</mark>English


An intuitive picture of pair breaking by a vibrating wire is developed, which makes dear how quasi-particles can escape from the wire at critical velocities the Landau critical velocity νL. Assuming strong gap suppression at the wire surface, a critical velocity of is obtained, for ideal dipole flow around a wire of circular cross-section. In addition, a further transition to enhanced quasi-particle emission is predicted to occur at a velocity More generally, for non-dipole flow, and where at αl characterizes the local superflow near the surface of the wire.