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Mixed-state fidelity and quantum criticality at finite temperature
文献类型：期刊论文
| 作者 | Zanardi, Paolo; Quan, H. T.; Wang, Xiaoguang; Sun, C. P. ; Zanardi, P , Inst Sci Interchange, Villa Gualino,Viale Severo 65, I-10133 Turin, Italy
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| 刊名 | PHYSICAL REVIEW A
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| 出版日期 | 2007 |
| 卷号 | 75期号:3页码:- |
| 关键词 | Entanglement |
| ISSN号 | 1050-2947 |
| 英文摘要 | We extend to finite temperature the fidelity approach to quantum phase transitions (QPTs). This is done by resorting to the notion of mixed-state fidelity that allows one to compare two density matrices corresponding to two different thermal states. By exploiting the same concept we also propose a finite-temperature generalization of the Loschmidt echo. Explicit analytical expressions of these quantities are given for a class of quasifree fermionic Hamiltonians. A numerical analysis is performed as well showing that the associated QPTs show their signatures in a finite range of temperatures. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000245326300026 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5777]  |
| 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 | Zanardi, P , Inst Sci Interchange, Villa Gualino,Viale Severo 65, I-10133 Turin, Italy |
| 推荐引用方式 GB/T 7714 | Zanardi, Paolo,Quan, H. T.,Wang, Xiaoguang,et al. Mixed-state fidelity and quantum criticality at finite temperature[J]. PHYSICAL REVIEW A,2007,75(3):-. |
| APA | Zanardi, Paolo,Quan, H. T.,Wang, Xiaoguang,Sun, C. P.,&Zanardi, P , Inst Sci Interchange, Villa Gualino,Viale Severo 65, I-10133 Turin, Italy.(2007).Mixed-state fidelity and quantum criticality at finite temperature.PHYSICAL REVIEW A,75(3),-. |
| MLA | Zanardi, Paolo,et al."Mixed-state fidelity and quantum criticality at finite temperature".PHYSICAL REVIEW A 75.3(2007):-. |
入库方式： OAI收割
来源：理论物理研究所
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