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Cosmological experiments in liquid He-4: status and prospects

Research output: Contribution to journalJournal article


<mark>Journal publication date</mark>2/05/1995
<mark>Journal</mark>Physica B: Condensed Matter
Issue number3-4
Number of pages6
Pages (from-to)209-214
<mark>Original language</mark>English


A recent experiment, in which a small volume of liquid 4He is expanded rapidly through the lambda transition to model the mechanism of cosmic string creation in the early universe, is reviewed. New data are presented, suggesting that, although most of the quantized vortices generated in the expansion are created (like cosmic strings) by passage through the phase transition at a finite speed, a proportion of them are probably produced through more conventional processes. Possible ways of redesigning the experiment, so as to reduce the latter extraneous vortex creation processes, are discussed.

Bibliographic note

Proceedings of the Symposium on Vortices, Interfaces and Mesoscopic Phenomena in Quantum Systems, Jyvaskyla, Finland, 4-9 June 1005