Condensed phase of Bose-Fermi mixtures with a pairing interaction

被引：19

作者：

Guidini, Andrea ^{[1
]}

Bertaina, Gianluca ^{[2
]}

Galli, Davide Emilio ^{[2
]}

Pieri, Pierbiagio ^{[1
]}

机构：

[1] Univ Camerino, Sch Sci & Technol, Div Phys, I-62032 Camerino, Italy

[2] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

来源：

PHYSICAL REVIEW A | 2015年 / 91卷 / 02期

关键词：

EINSTEIN CONDENSATION; MOLECULES; SUPERCONDUCTIVITY; DENSITY; STATE; BCS;

D O I：

10.1103/PhysRevA.91.023603

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the condensed phase of a Bose-Fermi mixture with a tunable pairing interaction between bosons and fermions with many-body diagrammatic methods and fixed-node diffusion quantum Monte Carlo simulations. A universal behavior of the condensate fraction and bosonic momentum distribution with respect to the boson concentration is found to hold in an extended range of boson-fermion couplings and concentrations. For vanishing boson density, we prove that the bosonic condensate fraction reduces to the quasiparticle weight Z of the Fermi polaron studied in the context of polarized Fermi gases, unifying in this way two apparently unrelated quantities.

引用

页数：5

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