Effect of quantum correction in the Bose-Hubbard model

被引：0

作者：

Matsumoto, Hideki ^{[1
]}

Takahashi, Kiyoshi ^{[1
]}

Ohashi, Yoji ^{[1
]}

机构：

[1] Univ Tsukuba, Inst Phys, Ibaraki 3058571, Japan

来源：

LOW TEMPERATURE PHYSICS, PTS A AND B | 2006年 / 850卷

基金：

日本学术振兴会;

关键词：

Bose-Einstein condensation; Bose-Hubbard model; superfluid-insulator transition; strongly correlated particle system;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Effects of quantum correction in the Bose-Hubbard model at finite temperature are investigated for a homogeneous atomic Bose gas in an optical lattice near its superfluid-insulator transition. Starting from a strong coupling limit, higher order quantum corrections due to the hopping interaction is included in a local approximation (a dynamical mean field approximation) of the non-crossing approximation. When the upper or lower Hubbard band approaches zero energy, there appears a shallow band in the middle of the Hubbard gap due to a strong correlation in the system.

引用

页码：53 / +

页数：2

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