PHASE-DIAGRAM OF THE BOSE-HUBBARD MODEL

被引：181

作者：

FREERICKS, JK ^{[1
]}

MONIEN, H ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106

来源：

EUROPHYSICS LETTERS | 1994年 / 26卷 / 07期

关键词：

D O I：

10.1209/0295-5075/26/7/012

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The first reliable analytic calculation of the phase diagram of the Bose gas on a d-dimensional lattice with on-site repulsion is presented. In one dimension, the analytic calculation is in excellent agreement with the numerical Monte Carlo results. In higher dimensions, the deviations from the Monte Carlo calculations are larger, but the correct shape of the Mott-insulator lobes is still obtained. Explicit expressions for the energy of the Mott and the <<defect>> phase are given in a strong-coupling expansion.

引用

页码：545 / 550

页数：6

共 15 条

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