Geometric phase and quantum phase transition in an inhomogeneous periodic XY spin-1/2 model
文献类型：期刊论文
| 作者 | Ma, YQ ; Chen, S |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2009 |
| 卷号 | 79期号:2 |
| 关键词 | ENSEMBLE-AVERAGE SPECTRUM TRANSVERSE FIELD BERRYS PHASE CHAIN COMPUTATION ENTANGLEMENT CONDUCTANCE DEGENERACY EVOLUTION STATES |
| ISSN号 | 1050-2947 |
| 通讯作者 | Ma, YQ: Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | The notion of geometric phase has been recently introduced to analyze the quantum phase transitions of many-body systems from the geometrical perspective. In this work, we study the geometric phase of the ground state for an inhomogeneous period-two anisotropic XY model in a transverse field. This model encompasses a group of familiar spin models as its special cases and shows a richer critical behavior. The exact solution is obtained by mapping on a fermionic system through the Jordan-Wigner transformation and constructing the relevant canonical transformation to realize the diagonalization of the Hamiltonian coupled in the k space. The results show that there may exist more than one quantum phase transition point at some parameter regions and these transition points correspond to the divergence or extremum properties of the Berry curvature. |
| 收录类别 | SCI |
| 资助信息 | NSF of China, National Program for Basic Research of MOST China; CAS |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/38693]  |
| 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 | Ma, YQ,Chen, S. Geometric phase and quantum phase transition in an inhomogeneous periodic XY spin-1/2 model[J]. PHYSICAL REVIEW A,2009,79(2). |
| APA | Ma, YQ,&Chen, S.(2009).Geometric phase and quantum phase transition in an inhomogeneous periodic XY spin-1/2 model.PHYSICAL REVIEW A,79(2). |
| MLA | Ma, YQ,et al."Geometric phase and quantum phase transition in an inhomogeneous periodic XY spin-1/2 model".PHYSICAL REVIEW A 79.2(2009). |
入库方式： OAI收割
来源：物理研究所
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