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Zanardi, Paolo; Quan, H. T.; Wang, Xiaoguang; Sun, C. P.; Zanardi, P , Inst Sci Interchange, Villa Gualino,Viale Severo 65, I-10133 Turin, Italy
Mixed-state fidelity and quantum criticality at finite temperature
Source PublicationPHYSICAL REVIEW A
KeywordEntanglement
AbstractWe 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.
2007
ISSN1050-2947
Volume75Issue:3Pages:-
Subject AreaPhysics
Indexed BySCI
Citation statistics
Cited Times:134[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5777
Collection理论物理所科研产出_SCI论文
Corresponding AuthorZanardi, P , Inst Sci Interchange, Villa Gualino,Viale Severo 65, I-10133 Turin, Italy
Recommended Citation
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):-.
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