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Nonappearance of vortices in fast mechanical expansions of liquid He=4 through the lambda transition.

Research output: Contribution to journalJournal article

Published

Journal publication date26/10/1998
JournalPhysical Review Letters
Journal number17
Volume81
Number of pages4
Pages3703-3706
Original languageEnglish

Abstract

A new experiment has been performed to study the formation of topological defects (quantized vortices) during rapid quenches of liquid He-4 through the superfluid transition, with particular care taken to minimize vortex creation via conventional hydrodynamic flow processes. It is found that the generated vortices, if any, are being produced at densities at least 2 orders of magnitude less than might be expected on the basis of the Kibble-Zurek mechanism.