Interacting bosons in an optical lattice: Bose-Einstein condensates and Mott insulator

被引：7
作者：
Fialko, O. [1 ]
Moseley, Ch. [1 ]
Ziegler, K. [1 ]
机构：
[1] Univ Augsburg, Inst Phys, D-8900 Augsburg, Germany
来源：
PHYSICAL REVIEW A | 2007年 / 75卷 / 05期
关键词：
D O I：
10.1103/PhysRevA.75.053616
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A dense Bose gas with hard-core interaction is considered in an optical lattice. We study the phase diagram in terms of a special mean-field theory that describes a Bose-Einstein condensate and a Mott insulator with a single particle per lattice site for zero as well as for nonzero temperatures. We calculate the densities, the excitation spectrum, and the static structure factor for each of these phases.
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页数：8
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