Superfluid-to-Bose-glass transition of hard-core bosons in a one-dimensional incommensurate optical lattice
Superfluid-to-Bose-glass transition of hard-core bosons in a one-dimensional incommensurate optical lattice
复制标题
一维不通约光学晶格中硬核玻色子的超流体到玻色玻璃转变
DOI：
10.1103/physreva.81.023626
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发表时间：
2010-02-01
影响因子：
2.9
通讯作者：
Wang, Yupeng
中科院分区：
文献类型：
--
作者：
Cai, Xiaoming;Chen, Shu;Wang, Yupeng
在一维无公度光晶格中研究了强排斥玻色气体的超流-安德森-绝缘体相变。在硬核极限下，玻色-费米映射允许我们用精确的数值方法处理系统。基于Aubry-Andre模型，我们研究了硬核玻色子系统从单粒子超流态到玻色玻璃态的相变，随着无公度势的强度相对于跳跃幅度的增加，单粒子态被安德森局域化.我们评估了超流分数，单粒子密度矩阵，动量分布，自然轨道，和他们的职业。所有这些物理量都表明系统中存在一个从超流到绝缘体的相变。
The superfluid-to-Anderson-insulator transition of a strongly repulsive Bose gas is studied in a one-dimensional incommensurate optical lattice. In the hard-core limit, the Bose-Fermi mapping allows us to deal with the system using the exact numerical method. Based on the Aubry-Andre model, we exploit the phase transition of the hard-core boson system from the superfluid phase with all single-particle states extended to the Bose-glass phase with all the single-particle states being Anderson localized as the strength of the incommensurate potential increases relative to the hopping amplitude. We evaluate the superfluid fraction, one-particle density matrices, momentum distributions, the natural orbitals, and their occupations. All of these quantities show that there exists a superfluid-to-insulator phase transition in the system.