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arXiv 0811.1280cond-mat.othercond-mat.stat-mech
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一维光晶格中冷玻色子原子超流到莫特绝缘体跃迁的特征

Signatures of the superfluid to Mott insulator transition in cold bosonic atoms in a one dimensional optical lattice

S. Ramanan, Tapan Mishra, Meetu Sethi Luthra, Ramesh V. Pai, B. P. Das

摘要:

利用有限尺寸密度矩阵重整化群方法研究了玻色-哈伯德模型.我们首次获得了一个完整的相图系统中存在的谐波陷阱,并比较它与均匀系统。为了实现从超流到莫特绝缘体相的转变,我们研究了这些相在动量分布、可见度、凝聚分数和特定密度下玻色子总数等方面的不同实验特征。各种实验签名和相图之间的关系突出显示。

英文摘要:

We study the Bose-Hubbard model using the finite size density matrix renormalization group method. We obtain for the first time a complete phase diagram for a system in the presence of a harmonic trap and compare it with that of the homogeneous system. To realize the transition from the superfluid to the Mott insulator phase we investigate different experimental signatures of these phases in quantities such as momentum distribution, visibility, condensate fraction and the total number of bosons at a particular density. The relationships between the various experimental signatures and the phase diagram are highlighted.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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