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Huo, MX; Li, Y; Song, Z; Sun, CP; Huo, MX (reprint author), Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China. | |
A QUANTUM SIMULATOR FOR PROBING MOTT LOBES VIA THE AC JOSEPHSON EFFECT | |
发表期刊 | INTERNATIONAL JOURNAL OF QUANTUM INFORMATION |
语种 | 英语 |
关键词 | Phase-transition Ultracold Atoms Einstein Superfluid Insulator |
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. |
2013 | |
ISSN | 0219-7499 |
卷号 | 11期号:5页码:1350049 |
学科领域 | Physics |
收录类别 | SCI |
项目资助者 | National Basic Research Program (973 Program) of China [2012CB921900]; CNSF [11374163] ; National Basic Research Program (973 Program) of China [2012CB921900]; CNSF [11374163] ; National Basic Research Program (973 Program) of China [2012CB921900]; CNSF [11374163] ; National Basic Research Program (973 Program) of China [2012CB921900]; CNSF [11374163] |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.itp.ac.cn/handle/311006/15300 |
专题 | SCI期刊论文 |
通讯作者 | Huo, MX (reprint author), Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China. |
推荐引用方式 GB/T 7714 | 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. |
APA | Huo, MX,Li, Y,Song, Z,Sun, CP,&Huo, MX .(2013).A QUANTUM SIMULATOR FOR PROBING MOTT LOBES VIA THE AC JOSEPHSON EFFECT.INTERNATIONAL JOURNAL OF QUANTUM INFORMATION,11(5),1350049. |
MLA | Huo, MX,et al."A QUANTUM SIMULATOR FOR PROBING MOTT LOBES VIA THE AC JOSEPHSON EFFECT".INTERNATIONAL JOURNAL OF QUANTUM INFORMATION 11.5(2013):1350049. |
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