Entanglement and off-diagonal long-range order of an eta-pairing state
文献类型：期刊论文
| 作者 | Fan, H ; Lloyd, S |
| 刊名 | JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
 |
| 出版日期 | 2005 |
| 卷号 | 38期号:23页码:5285 |
| 关键词 | STRONGLY CORRELATED ELECTRONS HUBBARD-MODEL QUANTUM STATE SUPERCONDUCTIVITY COMPUTATION SYMMETRY CHANNELS |
| ISSN号 | 0305-4470 |
| 通讯作者 | Fan, H: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | Off-diagonal long-range order (ODLRO) which is believed to be one characteristic of superconductivity is a quantum phenomenon not describable in classical mechanical terms. The quantum state constructed by eta-pairing demonstrates ODLRO. Entanglement is a key concept of the quantum information processing and has no classical counterpart. We study the entanglement property of the eta-pairing quantum state by concurrence and entropy which are two measures of the entanglement. We show that the concurrence of entanglement between one-site and the rest sites is exactly the correlation function of the ODLRO for the eta-pairing state in the thermodynamic limit. So, when the eta-pairing state is entangled, it demonstrates ODLRO and is thus in the superconducting phase, if it is a separable state, there is no ODLRO. In the thermodynamical limit, the entanglement between the M-site and other sites of the eta-pairing state does not vanish. Other types of ODLRO of the eta-pairing state are presented. We show that the behaviour of the ODLRO correlation functions is equivalent to that of the entanglement of the eta-pairing state. The scaling of the entropy of the entanglement for the eta-pairing state is studied. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/37461]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Fan, H,Lloyd, S. Entanglement and off-diagonal long-range order of an eta-pairing state[J]. JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL,2005,38(23):5285. |
| APA | Fan, H,&Lloyd, S.(2005).Entanglement and off-diagonal long-range order of an eta-pairing state.JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL,38(23),5285. |
| MLA | Fan, H,et al."Entanglement and off-diagonal long-range order of an eta-pairing state".JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL 38.23(2005):5285. |
入库方式： OAI收割
来源：物理研究所
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