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
收藏
页码：53 / +
页数：2
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