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Entropic quantifier of spin-boson nonclassicality
Zhang, Yue1,2,4; Jing, Boxuan2; He, Qiongyi1,2,3; Luo, Shunlong4,5
AbstractSpin systems interacting with boson environments are ubiquitous in nature. To what extent quantum states in such systems depart from classicality is becoming an increasingly important issue. Here, we study nonclassicality in systems involving the interaction between a spin and a boson mode. We introduce a simple and effective method for quantifying spin-boson nonclassicality in terms of the entropy excess between the classical and the quantum Tsallis entropy. The method can be naturally extended to more general systems. Fundamental properties of the nonclassicality quantifier are revealed, which render it reasonable for spin-boson states. Basic features are illustrated by a variety of typical spin-boson states. As applications, we further investigate spin-boson nonclassicality in the Dicke model, which sheds light on the normal-superradiant phase transition and quantum metrology.
Keywordspin-boson systems nonclassicality entropy excess Tsallis entropy quantum phase transition
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[11975026] ; National Natural Science Foundation of China[12125402] ; National Key R&D Program of China[2020YFA0712700] ; China Postdoctoral Science Foundation[2021M690414] ; Beijing Postdoctoral Research Foundation[2021ZZ091] ; Beijing Natural Science Foundation[Z190005]
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary ; Physics, Mathematical
WOS IDWOS:000871737700001
PublisherIOP Publishing Ltd
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Document Type期刊论文
Corresponding AuthorHe, Qiongyi
Affiliation1.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China
2.Peking Univ, Sch Phys, Frontiers Sci Ctr Nanooptoelect, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
3.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
4.Chinese Acad Sci, Acad Math & Syst Sci, Beijing 100190, Peoples R China
5.Univ Chinese Acad Sci, Sch Math Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Yue,Jing, Boxuan,He, Qiongyi,et al. Entropic quantifier of spin-boson nonclassicality[J]. JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL,2022,55(42):18.
APA Zhang, Yue,Jing, Boxuan,He, Qiongyi,&Luo, Shunlong.(2022).Entropic quantifier of spin-boson nonclassicality.JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL,55(42),18.
MLA Zhang, Yue,et al."Entropic quantifier of spin-boson nonclassicality".JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL 55.42(2022):18.
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