Entropic quantifier of spin-boson nonclassicality

doi:10.1088/1751-8121/ac96dd

	Entropic quantifier of spin-boson nonclassicality
	Zhang, Yue 2,4,5; Jing, Boxuan 5; He, Qiongyi 1,4,5; Luo, Shunlong 2,3
刊名	JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
	2022-10-21
卷号	55 期号:42 页码:18
关键词	spin-boson systems nonclassicality entropy excess Tsallis entropy quantum phase transition
ISSN号	1751-8113
DOI	10.1088/1751-8121/ac96dd
英文摘要	Spin 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.
资助项目	National 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研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000871737700001
内容类型	期刊论文
源URL	[http://ir.amss.ac.cn/handle/2S8OKBNM/60773]
专题	中国科学院数学与系统科学研究院
通讯作者	He, Qiongyi
作者单位	1.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China 2.Chinese Acad Sci, Acad Math & Syst Sci, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Math Sci, Beijing 100049, Peoples R China 4.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China 5.Peking Univ, Sch Phys, Frontiers Sci Ctr Nanooptoelect, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
推荐引用方式 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.