Current-induced instability of superfluid Fermi gases in optical lattices

Y. Yunomae*, I. Danshita, D. Yamamoto, N. Yokoshi, S. Tsuchiya

*この研究の対応する著者

研究成果: Article査読

4 被引用数 (Scopus)

抄録

We study the stability of superfluid flow of two-component Fermi gases in one-dimensional optical lattices. We find that the density fluctuation mode, the so-called Anderson-Bogoliubov mode, has the roton-like structure as seen in superfluid 4He. With increasing supercurrent, one of the roton-like minima reaches zero before the pair breaking occurs. This means that the instability of the superfluid Fermi gas is due to the spontaneous emission of the roton-like excitations of the Anderson-Bogoliubov mode instead of due to the Cooper pair breaking. We calculate the critical velocity determined by the roton-like structure for one-dimensional optical lattices.

本文言語English
論文番号032128
ジャーナルJournal of Physics: Conference Series
150
3
DOI
出版ステータスPublished - 2009

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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