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Quantum criticality from Fisher information
Song, Hongting1; Luo, Shunlong2; Fu, Shuangshuang3
AbstractQuantum phase transition is primarily characterized by a qualitative sudden change in the ground state of a quantum system when an external or internal parameter of the Hamiltonian is continuously varied. Investigating quantum criticality using information- theoretic methods has generated fruitful results. Quantum correlations and fidelity have been exploited to characterize the quantum critical phenomena. In this work, we employ quantum Fisher information to study quantum criticality. The singular or extremal point of the quantum Fisher information is adopted as the estimated thermal critical point. By a significant model constructed in Quan et al. (Phys Rev Lett 96: 140604, 2006), the effectiveness of this method is illustrated explicitly.
KeywordQuantum criticality Quantum phase transition Quantum Fisher information Quantum metrology
Funding ProjectNASA Advanced Exploration Systems program and NASA Ames Research Center ; AFRL Information Directorate[F4HBKC4162G001] ; Office of the Director of National Intelligence (ODNI) ; Intelligence Advanced Research Projects Activity (IARPA)[IAA 145483]
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary ; Physics, Mathematical
WOS IDWOS:000396813700005
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Document Type期刊论文
Corresponding AuthorFu, Shuangshuang
Affiliation1.China Acad Space Technol, Qian Xuesen Lab Space Technol, Beijing 100094, Peoples R China
2.Chinese Acad Sci, Acad Math & Syst Sci, Beijing 100190, Peoples R China
3.Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Song, Hongting,Luo, Shunlong,Fu, Shuangshuang. Quantum criticality from Fisher information[J]. QUANTUM INFORMATION PROCESSING,2017,16(4):14.
APA Song, Hongting,Luo, Shunlong,&Fu, Shuangshuang.(2017).Quantum criticality from Fisher information.QUANTUM INFORMATION PROCESSING,16(4),14.
MLA Song, Hongting,et al."Quantum criticality from Fisher information".QUANTUM INFORMATION PROCESSING 16.4(2017):14.
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