| Topological characterization of quantum phase transitions in a spin-1/2 model | |
| Feng, Xiao-Yong ; Zhang, Guang-Ming ; Xiang, Tao | |
| 2010-05-06 ; 2010-05-06 | |
| 关键词 | BREAKING Physics, Multidisciplinary |
| 中文摘要 | 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. |
| 语种 | 英语 ; 英语 |
| 出版者 | AMERICAN PHYSICAL SOC ; COLLEGE PK ; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/14353]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | Feng, Xiao-Yong,Zhang, Guang-Ming,Xiang, Tao. Topological characterization of quantum phase transitions in a spin-1/2 model[J],2010, 2010. |
| APA | Feng, Xiao-Yong,Zhang, Guang-Ming,&Xiang, Tao.(2010).Topological characterization of quantum phase transitions in a spin-1/2 model.. |
| MLA | Feng, Xiao-Yong,et al."Topological characterization of quantum phase transitions in a spin-1/2 model".(2010). |
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