Normal and anomalous densities in Bose-Einstein condensates with optical lattices

被引：1
|
作者：
Bendacha, M. [1 ]
Boudjemaa, A. [1 ]
机构：
[1] Hassiba Benbouali Univ Chlef, Fac Sci, Dept Phys, Chlef 02000, Algeria
来源：
CANADIAN JOURNAL OF PHYSICS | 2014年 / 92卷 / 05期
关键词：
GASES; ATOMS;
D O I：
10.1139/cjp-2013-0396
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the quantum phase transition from the superfluid to the Mott insulator state in two-and three-dimensional Bose-Einstein condensate with optical lattices using Bose-Hubbard Hamiltonian within the generalized Hatree-Fock-Bogoliubov approximation. The behavior of the depletion and the anomalous fraction has been investigated in the Mott insulator phase. We found that at T = 0, these quantities become significant in two and three dimensions. It is shown also that the dimensionality of the lattice enhances the anomalous density.
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页码：375 / 379
页数：5
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