Effects of fermion-boson interaction in neutral atomic systems

Nobuhiko Yokoshi*, Susumu Kurihara

*この研究の対応する著者

    研究成果: Article査読

    3 被引用数 (Scopus)

    抄録

    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.

    本文言語English
    論文番号064501
    ページ(範囲)645011-645015
    ページ数5
    ジャーナルPhysical Review B - Condensed Matter and Materials Physics
    68
    6
    出版ステータスPublished - 2003 8月

    ASJC Scopus subject areas

    • 凝縮系物理学

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