Quantum critical dynamics of a qubit coupled to an isotropic Lipkin-Meshkov-Glick bath
文献类型：期刊论文
| 作者 | Quan, H. T.; Wang, Z. D.; Sun, C. P. ; Quan, HT , Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China
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| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2007 |
| 卷号 | 76期号:1页码:- |
| 关键词 | Body Approximation Methods Jaynes-cummings Model Solvable Model Antiferromagnetic Environment Phase-transition Dicke-model Entanglement Decoherence Validity System |
| ISSN号 | 1050-2947 |
| 英文摘要 | We explore a dynamic signature of quantum phase transition (QPT) in an isotropic Lipkin-Meshkov-Glick (LMG) model by studying the time evolution of a central qubit coupled to it. We evaluate exactly the time-dependent purity, which can be used to measure quantum coherence, of the central qubit. It is found that distinctly different behaviors of the purity as a function of the parameter reveal clearly the QPT point in the system. It is also clarified that the present model is equivalent to an anti-Jaynes-Cummings model under certain conditions. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000248486600022 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5698]  |
| 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 | Quan, HT , Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Quan, H. T.,Wang, Z. D.,Sun, C. P.,et al. Quantum critical dynamics of a qubit coupled to an isotropic Lipkin-Meshkov-Glick bath[J]. PHYSICAL REVIEW A,2007,76(1):-. |
| APA | Quan, H. T.,Wang, Z. D.,Sun, C. P.,&Quan, HT , Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China.(2007).Quantum critical dynamics of a qubit coupled to an isotropic Lipkin-Meshkov-Glick bath.PHYSICAL REVIEW A,76(1),-. |
| MLA | Quan, H. T.,et al."Quantum critical dynamics of a qubit coupled to an isotropic Lipkin-Meshkov-Glick bath".PHYSICAL REVIEW A 76.1(2007):-. |
入库方式： OAI收割
来源：理论物理研究所
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