Passive and active nonlocality sharing for a two-qubit system via weak measurements

doi:10.1103/PhysRevA.100.052121

	Passive and active nonlocality sharing for a two-qubit system via weak measurements
	Ren, Changliang 2,3,4; Feng, Tianfeng 1,5; Yao, Dan 2; Shi, Haofei 2; Chen, Jingling 6; Zhou, Xiaoqi 1,5
刊名	PHYSICAL REVIEW A
	2019-11-26
卷号	100 期号:5 页码:6
ISSN号	2469-9926
DOI	10.1103/PhysRevA.100.052121
通讯作者	Ren, Changliang(renchangliang@cigit.ac.cn) ; Chen, Jingling(chenjl@nankai.edu.cn) ; Zhou, Xiaoqi(zhouxq8@mail.sysu.edu.cn)
英文摘要	A well-known property of quantum nonlocality is monogamy. However, recent research by Silva et al. shows that multiple observers can share the nonlocality by using weak measurements [Phys. Rev. Lett. 114, 250401 (2015)]. In this paper, we deeply discuss nonlocality sharing for an arbitrary two-qubit state via weak measurements. Two types of nonlocality sharing, passive nonlocality sharing and active nonlocality sharing, which is another type of double violation of Clauser-Horne-Shimony-Holt (CHSH) inequality with many counterintuitive results existing, are fully analyzed. The two types are quite distinct. Active nonlocality sharing can be observed when Bob1 performs strong measurements only except for the ideal strong measurements. Also, a double violation still can be observed in the active nonlocality sharing even using a square pointer type for weak measurements of Bob1, which is impossible in the passive one. As a special example, for a Bell state, a double violation of Clauser-Horne-Shimony-Holt inequality can be always observed in a broad range whether the weak measurement of Bob1 is with an optimal pointer or a square pointer.
资助项目	National key research and development program[2017YFA0305200] ; National key research and development program[2016YFA0301700] ; Youth Innovation Promotion Association (CAS)[2015317] ; National Natural Science Foundation of China[11605205] ; Natural Science Foundation of Chongqing[cstc2018jcyjAX0656] ; Entrepreneurship and Innovation Support Program for Chongqing Overseas Returnees[cx2017134] ; Entrepreneurship and Innovation Support Program for Chongqing Overseas Returnees[cx2018040] ; CAS Key Laboratory of Microscale Magnetic Resonance ; CAS Key Laboratory of Quantum Information ; Natural Science Foundation of Guangdong[2016A030312012] ; National Young 1000 Talents Plan ; National Natural Science Foundations of China[11875167] ; Fundamental Research Funds for the Central Universities, Nankai University[63191507]
WOS研究方向	Optics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000498843900002
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10052]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Ren, Changliang; Chen, Jingling; Zhou, Xiaoqi
作者单位	1.Sun Yat Sen Univ, Sch Phys, Guangzhou 510006, Guangdong, Peoples R China 2.Chinese Acad Sci, Ctr Nanofabricat & Syst Integrat, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.Univ Sci & Technol China, CAS Key Lab Microscale Magnet Resonance, Hefei 230026, Anhui, Peoples R China 4.Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026, Anhui, Peoples R China 5.Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510006, Guangdong, Peoples R China 6.Nankai Univ, Chern Inst Math, Theoret Phys Div, Tianjin 300071, Peoples R China
推荐引用方式 GB/T 7714	Ren, Changliang,Feng, Tianfeng,Yao, Dan,et al. Passive and active nonlocality sharing for a two-qubit system via weak measurements[J]. PHYSICAL REVIEW A,2019,100(5):6.
APA	Ren, Changliang,Feng, Tianfeng,Yao, Dan,Shi, Haofei,Chen, Jingling,&Zhou, Xiaoqi.(2019).Passive and active nonlocality sharing for a two-qubit system via weak measurements.PHYSICAL REVIEW A,100(5),6.
MLA	Ren, Changliang,et al."Passive and active nonlocality sharing for a two-qubit system via weak measurements".PHYSICAL REVIEW A 100.5(2019):6.