Knowledge Management System of Institute of Theoretical Physics, CAS
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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| Quantum critical dynamics of a qubit coupled to an isotropic Lipkin-Meshkov-Glick bath | |
| Source Publication | PHYSICAL REVIEW A
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| Keyword | Body Approximation Methods Jaynes-cummings Model Solvable Model Antiferromagnetic Environment Phase-transition Dicke-model Entanglement Decoherence Validity System |
| Abstract | 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. |
| 2007 | |
| ISSN | 1050-2947 |
| Volume | 76Issue:1Pages:- |
| Subject Area | Physics |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/5698 |
| Collection | 理论物理所科研产出_SCI论文 |
| Corresponding Author | Quan, HT , Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China |
| Recommended Citation 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):-. |
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