Collective excitations of dilute Bose-Fermi superfluid mixtures

B. H. Valtan*, M. Nishida, S. Kurihara

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    Using the effective action formalism, we investigate collective excitations of a dilute mixture of a Bose gas and a two component Fermi gas when both bosons and fermions have undergone superfluid transitions. We show that there is a repulsion between Bogoliubov and Anderson modes, which has important implications including disappearance of boson superfluidity. We derive an analytic expression for the long-wavelength dispersion relation of the mixture at zero temperature and give a condition for the instability. We also numerically calculate the damping rate due to boson-fermion interaction at finite temperatures and show that the two modes are stable at sufficiently low temperatures.

    Original languageEnglish
    Pages (from-to)217-222
    Number of pages6
    JournalLaser Physics
    Issue number1
    Publication statusPublished - 2002 Jan 1

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)
    • Atomic and Molecular Physics, and Optics


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