Mott transition of fermionic atoms in a three-dimensional optical trap

被引：104

作者：

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

Costi, T. A. ^{[2
]}

Rosch, A. ^{[1
]}

机构：

[1] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany

[2] Res Ctr Julich, Inst Solid State Res Phys, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.100.056403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study theoretically the Mott metal-insulator transition for a system of fermionic atoms confined in a three-dimensional optical lattice and a harmonic trap. We describe an inhomogeneous system of several thousand sites using an adaptation of dynamical mean-field theory solved efficiently with the numerical renormalization group method. Above a critical value of the on-site interaction, a Mott-insulating phase appears in the system. We investigate signatures of the Mott phase in the density profile and in time-of-flight experiments.

引用

页数：4

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