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题名: Finite-temperature effects on the number fluctuation of ultracold atoms across the superfluid-to-Mott-insulator transition
作者: Lu, Xiancong ;  Yu, Yue
刊名: PHYSICAL REVIEW A
出版日期: 2006
卷号: 74, 期号:6, 页码:-
关键词: BOSE-HUBBARD MODEL ;  OPTICAL LATTICES ;  EINSTEIN CONDENSATE ;  PHASE-TRANSITION ;  QUANTUM GASES ;  BOSONS ;  THERMODYNAMICS ;  DYNAMICS ;  SYSTEMS ;  DIAGRAM
学科分类: Physics
通讯作者: Lu, XC , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We study the thermodynamics of ultracold Bose atoms in optical lattices by numerically diagonalizing the mean-field Hamiltonian of the Bose-Hubbard model. This method well describes the behavior of long-range correlations and therefore is valid deep in the superfluid phase. For the homogeneous Bose-Hubbard model, we draw the finite-temperature phase diagram and calculate the superfluid density at unity filling. We evaluate the finite-temperature effects in a recent experiment probing number fluctuation [Phys. Rev. Lett. 96 090401 (2006)], and find that our finite-temperature curves give a better fitting to the experimental data, implying non-negligible temperature effects in this experiment.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000243166700126
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5825
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Lu, Xiancong,Yu, Yue. Finite-temperature effects on the number fluctuation of ultracold atoms across the superfluid-to-Mott-insulator transition[J]. PHYSICAL REVIEW A,2006,74(6):-.
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