Three-component fermionic atoms with repulsive interaction in optical lattices

被引：24

作者：

Miyatake, Shin-ya ^{[1
]}

Inaba, Kensuke ^{[2
,3
]}

Suga, Sei-ichiro ^{[1
,4
]}

机构：

[1] Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan

[2] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[3] JST, CREST, Chiyoda Ku, Tokyo 1020075, Japan

[4] Univ Hyogo, Dept Mat Sci & Chem, Himeji, Hyogo 6712280, Japan

来源：

PHYSICAL REVIEW A | 2010年 / 81卷 / 02期

基金：

日本学术振兴会;

关键词：

MEAN-FIELD THEORY; INSULATOR;

D O I：

10.1103/PhysRevA.81.021603

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate three-component (colors) repulsive fermionic atoms in optical lattices using the dynamical mean-field theory. Depending on the anisotropy of the repulsive interactions, either a color density-wave state or a color-selective staggered state appears at half filling. In the former state, pairs of atoms with two of the three colors and atoms with the third color occupy different sites alternately. In the latter state, atoms with two of the three colors occupy different sites alternately and atoms with the third color are itinerant throughout the system. When the interactions are isotropic, both states are degenerate. We discuss the results using an effective model.

引用

页数：4