Quantum Phases of Cold Bosonic Atoms in an Optical Lattice with Inhomogeneous Atomic Interactions and Coexistence of Multi Phases

被引：0
|
作者：
Li, Yan-Ying [1 ]
Hou, Jing-Min [1 ]
机构：
[1] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2017年 / 67卷 / 04期
基金：
中国国家自然科学基金;
关键词：
optical lattice; quantum phase; Bose-Hubbard model; MOTT INSULATOR; TRANSITION; SUPERFLUID;
D O I：
10.1088/0253-6102/67/4/421
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study cold bosonic atoms on a two-dimensional inhomogeneous optical lattice with site-dependent atomic interactions. With the tight -binding approximation, we derive the extended Bose Hubbard model. Base on the mean-field approximation, the ground states are solved by the exact diagonalization method. We calculate the mean-field order parameter and particle number density for the ground states. We find the coexistence of superfluid phase and Mott-insulator phase on the two-dimensional inhomogeneous optical lattice in appropriate parameter ranges.
引用
收藏
页码：421 / 424
页数：4
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