First principle explanation of phase transition for Bose-Einstein condensates in optical lattices

被引:1
作者
Sacchetti, Andrea [1 ]
机构
[1] Univ Modena & Reggio Emilia, Dept Phys Comp Sci & Math, I-41125 Modena, Italy
关键词
SUPERFLUID-INSULATOR-TRANSITION; ULTRACOLD GASES; BIFURCATION; EQUATIONS; ATOMS;
D O I
10.1140/epjb/e2014-50404-x
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
In this paper we consider Bose-Einstein condensates (BECs) in one-, two-and three-dimension lattice potentials. The key argument for the explanation of the transition from Superfluidity phase to Mott-Insulator phase is suggested to be the spontaneous symmetry breaking effect which occurs for critical values of the ratio between the on-site interaction term and the hopping matrix element. Such an effect can be directly seen in the Gross-Pitaevskii equation with double-well potentials and it also explains the different behavior between one-dimensional models and two/three-dimensional models.
引用
收藏
页数:6
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