Beliaev Damping and Kelvin Mode Spectroscopy of a Bose-Einstein Condensate in the Presence of a Vortex Line

T. Mizushima, M. Ichioka, K. Machida

    Research output: Contribution to journalArticlepeer-review

    Abstract

    It is demonstrated theoretically that the counter-rotating quadrupole mode in a vortex of Bose-Einstein condensates can decay into a pair of Kelvin modes via the Beliaev process. We calculate the spectral weight of a density-response function within the Bogoliubov framework, taking account of both Beliaev and Landau processes. Good agreement with experiment on [Formula presented] by Bretin et al. [Phys. Rev. Lett. 90, 100403 (2003)] allows us to unambigiously identify the decayed mode as the Kelvin wave propagating along a vortex line.

    Original languageEnglish
    Pages (from-to)4
    Number of pages1
    JournalPhysical Review Letters
    Volume90
    Issue number18
    DOIs
    Publication statusPublished - 2003

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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