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Mixed-state fidelity and quantum criticality at finite temperature
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
发表期刊PHYSICAL REVIEW A
ISSN1050-2947
卷号75期号:3页码:-
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.
部门归属Inst Sci Interchange, I-10133 Turin, Italy; Univ So Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Zhejiang Univ, Inst Modern Phys, Dept Phys, Hangzhou 310027, Peoples R China
关键词Entanglement
学科领域Physics
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收录类别SCI
WOS记录号WOS:000245326300026
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被引频次:132[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5777
专题理论物理所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
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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):-.
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