Effects of fermion-boson interaction in neutral atomic systems

Nobuhiko Yokoshi, Susumu Kurihara

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    We investigate the collective excitations of 3He-4He mixture films at zero temperature within the random phase approximation and linear response theory. In a low concentration regime of 3He, a level repulsion between zero sound and third sound modes is derived, which opens the possibility to observe quantum mechanical coherence between a 3He particle-hole pair and the condensate of 4He. We also investigate the 3He-4He vertex corrections in the ladder approximation, and show that the third branch, the combined mode of fermionic particle-hole pair and the third sound quanta, provides a unique correction to the Landau f function. Some implications for a fermion-boson mixture of alkali atoms in a potential trap are discussed.

    Original languageEnglish
    Article number064501
    Pages (from-to)645011-645015
    Number of pages5
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume68
    Issue number6
    Publication statusPublished - 2003 Aug

    Fingerprint

    Bosons
    Fermions
    bosons
    fermions
    Acoustic waves
    zero sound
    acoustics
    approximation
    ladders
    condensates
    low concentrations
    alkalies
    apexes
    Ladders
    traps
    Alkalies
    interactions
    excitation
    atoms
    Atoms

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Effects of fermion-boson interaction in neutral atomic systems. / Yokoshi, Nobuhiko; Kurihara, Susumu.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 68, No. 6, 064501, 08.2003, p. 645011-645015.

    Research output: Contribution to journalArticle

    Yokoshi, Nobuhiko ; Kurihara, Susumu. / Effects of fermion-boson interaction in neutral atomic systems. In: Physical Review B - Condensed Matter and Materials Physics. 2003 ; Vol. 68, No. 6. pp. 645011-645015.
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