Superfluid density in the BCS-BEC crossover regime of a two-component Fermi gas at finite temperatures

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We investigate the superfluid carrier density ρ s in the BCS-BEC crossover regime of a superfluid Fermi gas at finite temperatures. Including pairing fluctuations within the gaussian fluctuation approximation, we determine the superfluid order parameter Δ, Fermi chemical potential μ, as well as ρ s , in a consistent manner. In the weak-coupling regime, the normal fluid density ρ n ρ-ρ s is dominated by quasi-particle excitations associated with the dissociation of Cooper pairs. As one approaches the BCS-BEC crossover regime, effects of pairing fluctuations on ρ n become strong. In the strong-coupling BEC regime, ρ n is shown to be dominated by Bogoliubov phonon in a molecular Bose superfluid.

本文言語English
ページ(範囲)609-612
ページ数4
ジャーナルJournal of Superconductivity and Novel Magnetism
20
7-8
DOI
出版ステータスPublished - 2007 11 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

フィンガープリント 「Superfluid density in the BCS-BEC crossover regime of a two-component Fermi gas at finite temperatures」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル