Non-Appearance of Vortices in Fast Mechanical Expansions of Liquid 4He Through the Lambda Transition
M. E. Dodd, P. C. Hendry, N. S. Lawson, P. V. E. McClintock, C. D. H. Williams
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.
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