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题名: A QUANTUM SIMULATOR FOR PROBING MOTT LOBES VIA THE AC JOSEPHSON EFFECT
作者: Huo, MX ;  Li, Y ;  Song, Z ;  Sun, CP
刊名: INTERNATIONAL JOURNAL OF QUANTUM INFORMATION
出版日期: 2013
卷号: 11, 期号:5, 页码:1350049
关键词: PHASE-TRANSITION ;  ULTRACOLD ATOMS ;  EINSTEIN ;  SUPERFLUID ;  INSULATOR
学科分类: Physics
通讯作者: Huo, MX (reprint author), Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
部门归属: [Huo, Ming-Xia; Li, Ying; Song, Zhi; Sun, Chang-Pu] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China; [Sun, Chang-Pu] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: In this paper, we propose to directly detect Mott lobes, i.e. the order parameter hai, describing the Mott insulator (MI) to superfiuid (SF) quantum phase transition of the Bose-Hubbard (BH) model. By weakly coupling the system to an environment in the SF phase, the U(1) symmetry breaking of the system is simulated, and the order parameter can be read from the AC Josephson current between the system and the environment. The relation between the order parameter and the Josephson current is obtained from both the mean-field theory approach and an exact numerical simulation of a finite-size example. Our numerical simulations show that the pro file of the order parameter read from the Josephson current is di r erent from it predicted by the mean field theory, but similar to it in a system whose U(1) symmetry is broken by a weak field proportional to a +a. This proposal is feasible in optical lattices.
资助者: National Basic Research Program (973 Program) of China [2012CB921900]; CNSF [11374163]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000327313300005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15300
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Huo, MX,Li, Y,Song, Z,et al. A QUANTUM SIMULATOR FOR PROBING MOTT LOBES VIA THE AC JOSEPHSON EFFECT[J]. INTERNATIONAL JOURNAL OF QUANTUM INFORMATION,2013,11(5):1350049.
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