Superfluidity and magnetism in multicomponent ultracold fermions

被引：89

作者：

Cherng, R. W. ^{[1
]}

Refael, G.

Demler, E.

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] CALTECH, Dept Phys, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 13期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.99.130406

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the interplay between superfluidity and magnetism in a multicomponent gas of ultracold fermions. Ward-Takahashi identities constrain possible mean-field states describing order parameters for both pairing and magnetization. The structure of global phase diagrams arises from competition among these states as functions of anisotropies in chemical potential, density, or interactions. They exhibit first and second order phase transition as well as multicritical points, metastability regions, and phase separation. We comment on experimental signatures in ultracold atoms.

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