Phase dependence of phonon tunnelling in bosonic superfluid-insulator- superfluid junctions

Ippei Danshita*, Nobuhiko Yokoshi, Susumu Kurihara

*この研究の対応する著者

    研究成果: Article査読

    32 被引用数 (Scopus)

    抄録

    We consider the tunnelling of phonon excitations across a potential barrier spatially separating two condensates with different macroscopic phases. We analyse the relation between the phase difference φ of the two condensates and the transmission coefficient T by solving the Bogoliubov equations. It is found that T strongly depends on φ, and that the perfect transmission of low-energy excitations disappears when the phase difference reaches the critical value which gives the maximum supercurrent of the condensate. We also discuss the feasibility of observing the phase differences in experiments.

    本文言語English
    論文番号44
    ジャーナルNew Journal of Physics
    8
    DOI
    出版ステータスPublished - 2006 3 28

    ASJC Scopus subject areas

    • 物理学および天文学(全般)

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