Non-Appearance of Vortices in Fast Mechanical Expansions of Liquid 4He Through the Lambda Transition

Abstract

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

4 pages plus 4 Postscript figures

References in corpus (2)

• Vortex Loop Phase Transitions in Liquid Helium, Cosmic Strings, and High-T_c Superconductors
• A Re-examination of Quenches in ${}^4$He

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