Phys. Rev. Lett. 81, 3703–3706 (1998)Nonappearance of Vortices in Fast Mechanical Expansions of Liquid 4He through the Lambda TransitionReceived 10 June 1998; published in the issue dated 26 October 1998 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 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. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.3703
DOI:
10.1103/PhysRevLett.81.3703
PACS:
67.40.Vs
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