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Regular vortex production by a moving wire in superfluid He-3-B.

Research output: Contribution in Book/Report/ProceedingsChapter

Published

Publication date2000
Host publicationTopological Defects and the non-equilibrium dynamics of symmetry breaking phase transitions
EditorsY. M. Bunkov, H. Godfrin
Place of publicationDordrecht
PublisherSpringer
Pages345-351
Number of pages7
Volume549
ISBN (Print)978-0-7923-6204-3
Original languageEnglish

Publication series

NameNATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES
PublisherSpringer

Abstract

We report spectacular features on the velocity-force characteristics of a vibrating wire resonator in superfluid He-3-B at ultralow temperatures. We see steps and discontinuities in the characteristics. The steps display two separate critical velocities where firstly some 'event' occurs, causing the wire to lose energy and lose amplitude, followed by a second lower critical velocity where the 'event' decouples. We speculate that these events arise from vortex loop creation at asperities on the vibrating wire.