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Topological characterization of quantum phase transitions in a spin-1/2 model
文献类型：期刊论文
| 作者 | Feng, Xiao-Yong; Zhang, Guang-Ming; Xiang, Tao ; Feng, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
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| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2007 |
| 卷号 | 98期号:8页码:- |
| ISSN号 | 0031-9007 |
| 关键词 | Breaking |
| 英文摘要 | We have introduced a novel Majorana representation of S=1/2 spins using the Jordan-Wigner transformation and have shown that a generalized spin model of Kitaev defined on a brick-wall lattice is equivalent to a model of noninteracting Majorana fermions with Z(2) gauge fields without redundant degrees of freedom. The quantum phase transitions of the system at zero temperature are found to be of topological type and can be characterized by nonlocal string order parameters (SOP). In appropriate dual representations, these SOP become local order parameters and the basic concept of Landau theory of continuous phase transition can be applied. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000244420700055 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5785]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Feng, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, Xiao-Yong,Zhang, Guang-Ming,Xiang, Tao,et al. Topological characterization of quantum phase transitions in a spin-1/2 model[J]. PHYSICAL REVIEW LETTERS,2007,98(8):-. |
| APA | Feng, Xiao-Yong,Zhang, Guang-Ming,Xiang, Tao,&Feng, XY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.(2007).Topological characterization of quantum phase transitions in a spin-1/2 model.PHYSICAL REVIEW LETTERS,98(8),-. |
| MLA | Feng, Xiao-Yong,et al."Topological characterization of quantum phase transitions in a spin-1/2 model".PHYSICAL REVIEW LETTERS 98.8(2007):-. |
入库方式： OAI收割
来源：理论物理研究所
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