期刊
PHYSICAL REVIEW LETTERS
卷 85, 期 12, 页码 2418-2421出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.2418
关键词
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We calculate the effects of induced interactions on the transition temperature to the BCS state in dilute Fermi gases. For a pure Fermi system with two species having equal densities, the transition temperature is suppressed by a factor (4e)(1/3) approximate to 2.2, and for nu fermion species, the transition temperature is increased by a factor (4e)(nu/3-1) approximate to 2.2(nu-3) For mixtures of fermions and bosons the exchange of boson density fluctuations gives rise to an attractive interaction, and we estimate the increase of the transition temperature due to this effect.
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