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Macroscopic quantum tunnelling of vortices in He II.

Hendry, P. C. and Lawson, N. S. and McClintock, Peter V. E. and Williams, C. D. H. and Bowley, R. M. (1988) Macroscopic quantum tunnelling of vortices in He II. Physical Review Letters, 60 (7). pp. 604-607. ISSN 1079-7114

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    Abstract

    Experimental evidence is presented showing that the creation of vortices in He II involves macroscopic quantum tunneling through, or thermal activation over, a potential-energy barrier E. The investigations, based on measurements of the rate at which negative ions create vortex rings in the isotopically pure superfluid within the temperature range 50 < T < 500 mK, have yielded a barrier height of E/kB = 3.1 ± 0.1 K, in excellent agreement with the theoretical value predicted by Muirhead, Vinen, and Donnelly.

    Item Type: Article
    Journal or Publication Title: Physical Review Letters
    Subjects: Q Science > QC Physics
    Departments: Faculty of Science and Technology > Physics
    Faculty of Health and Medicine > Health Research
    ID Code: 32319
    Deposited By: Professor P. V. E. McClintock
    Deposited On: 23 Mar 2010 10:19
    Refereed?: Yes
    Published?: Published
    Last Modified: 14 Apr 2015 09:04
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/32319

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