QUANTUM PHASES OF ULTRACOLD BOSONIC ATOMS IN A TWO-DIMENSIONAL OPTICAL SUPERLATTICE

被引：4
|
作者：
Hou, Jing-Min [1 ]
机构：
[1] Southeast Univ, Dept Phys, Nanjing 211189, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2009年 / 23卷 / 01期
基金：
美国国家科学基金会;
关键词：
Optical superlattice; ultracold atom; quantum phase; LATTICE; GAS; TRANSITION; SUPERFLUID;
D O I：
10.1142/S0217984909017820
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study quantum phases of ultracold bosonic atoms in a two-dimensional optical superlattice. The extended Bose-Hubbard model derived from the system of ultracold bosonic atoms in an optical superlattice is solved numerically with the Gutzwiller approach. We find that the modulated superfluid (MS), Mott-insulator (MI) and density-wave (DW) phases appear in some regimes of parameters. The experimental detection of the firest-order correlations and the second-order correlations of different quantum phases with time-of-flight and noise-correlation techniques is proposed.
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页码：25 / 33
页数：9
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