Decay of superflow confined in thin torus: A realization of tunneling quantum fields

Munehiro Nishida, Susumu Kurihara

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    The quantum nucleation of phase slips in neutral superfluids confined in a thin torus is investigated by means of the collective coordinate method. We have devised, with numerical justification, a certain collective coordinate to describe the quantum nucleation process of a phase slip. Considering the quantum fluctuation around the local minimum of the action, we calculate the effective mass of the phase slip. Due to the coherence of the condensate throughout the torus, the effective mass is proportional to the circumference L of the torus, and the decay rate has a strong exponential L-dependence.

    Original languageEnglish
    Pages (from-to)3778-3781
    Number of pages4
    JournalJournal of the Physical Society of Japan
    Issue number12
    Publication statusPublished - 1999 Dec



    • Bose Einstein condensation
    • Phase slip
    • Quantum nucleation

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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