Collective excitations of dilute Bose-Fermi superfluid mixtures

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

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    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
    Volume12
    Issue number1
    Publication statusPublished - 2002 Jan 1

    Fingerprint

    Bosons
    bosons
    Fermions
    fermions
    excitation
    Superfluid helium
    superfluidity
    Gases
    gases
    Temperature
    Damping
    damping
    formalism
    Wavelength
    temperature
    wavelengths
    interactions

    ASJC Scopus subject areas

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

    Cite this

    Valtan, B. H., Nishida, M., & Kurihara, S. (2002). Collective excitations of dilute Bose-Fermi superfluid mixtures. Laser Physics, 12(1), 217-222.

    Collective excitations of dilute Bose-Fermi superfluid mixtures. / Valtan, B. H.; Nishida, M.; Kurihara, S.

    In: Laser Physics, Vol. 12, No. 1, 01.01.2002, p. 217-222.

    Research output: Contribution to journalArticle

    Valtan, BH, Nishida, M & Kurihara, S 2002, 'Collective excitations of dilute Bose-Fermi superfluid mixtures', Laser Physics, vol. 12, no. 1, pp. 217-222.
    Valtan BH, Nishida M, Kurihara S. Collective excitations of dilute Bose-Fermi superfluid mixtures. Laser Physics. 2002 Jan 1;12(1):217-222.
    Valtan, B. H. ; Nishida, M. ; Kurihara, S. / Collective excitations of dilute Bose-Fermi superfluid mixtures. In: Laser Physics. 2002 ; Vol. 12, No. 1. pp. 217-222.
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