Efficient Direct Measurement of Arbitrary Quantum Systems via Weak Measurement

doi:10.1103/PhysRevApplied.12.014045

	Efficient Direct Measurement of Arbitrary Quantum Systems via Weak Measurement
	Du, Jiangfeng 1,2,3,6; Wang, Ya 1,2,3,6; Ren, Changliang 3,4,5
刊名	PHYSICAL REVIEW APPLIED
	2019-07-24
卷号	12 期号:1 页码:10
ISSN号	2331-7019
DOI	10.1103/PhysRevApplied.12.014045
通讯作者	Ren, Changliang(renchangliang@cigit.ac.cn)
英文摘要	Obtaining the density matrix that fully describes a quantum system is central to quantum science. Recently, the technique of "direct measurement" has been proposed to characterize a quantum state in situ; however, all the existing schemes require sequential weak and strong measurements, which strongly limits their practical application. Here, we present an efficient scheme for directly measuring arbitrary quantum matrix elements with only one strong measurement or weak measurement on each qudit. Our scheme is experimentally feasible for the direct measurement of arbitrary quantum states; in particular, multiparticle quantum entangled states. This scheme has applications in the characterization of large-scale quantum systems.
资助项目	National Key R&D Program of China[2017YFA0305200] ; National Key R&D Program of China[2018YFA0306600] ; National Key R&D Program of China[2017YFA0305000] ; National Natural Science Foundation of China (NNSFC)[11605205] ; National Natural Science Foundation of China (NNSFC)[81788101] ; National Natural Science Foundation of China (NNSFC)[11761131011] ; National Natural Science Foundation of China (NNSFC)[11775209] ; Anhui Initiative in Quantum Information Technologies[AHY050000] ; Natural Science Foundation of Chongqing[cstc2015jcyjA00021] ; 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] ; Chinese Academy of Sciences (CAS)[GJJSTD20170001] ; Chinese Academy of Sciences (CAS)[QYZDY-SSW-SLH004] ; Innovative Program of the Development Foundation of Hefei Center for Physical Science and Technology[2017FXCX005] ; Fundamental Research Funds for the Central Universities ; CAS Key Laboratory of Microscale Magnetic Resonance ; CAS Key Laboratory of Quantum Information ; Thousand-Young-Talent Program of China
WOS关键词	LOGIC GATES ; REALIZATION ; INFORMATION ; COMPONENT ; VALUES ; STATES ; SPIN
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000477919500004
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China (NNSFC) ; Anhui Initiative in Quantum Information Technologies ; Natural Science Foundation of Chongqing ; Entrepreneurship and Innovation Support Program for Chongqing Overseas Returnees ; Chinese Academy of Sciences (CAS) ; Innovative Program of the Development Foundation of Hefei Center for Physical Science and Technology ; Fundamental Research Funds for the Central Universities ; CAS Key Laboratory of Microscale Magnetic Resonance ; CAS Key Laboratory of Quantum Information ; Thousand-Young-Talent Program of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/132922]
专题	中国科学院近代物理研究所
通讯作者	Ren, Changliang
作者单位	1.Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China 2.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, 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.Chinese Acad Sci, Ctr Nanofabricat & Syst Integrat, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 6.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Du, Jiangfeng,Wang, Ya,Ren, Changliang. Efficient Direct Measurement of Arbitrary Quantum Systems via Weak Measurement[J]. PHYSICAL REVIEW APPLIED,2019,12(1):10.
APA	Du, Jiangfeng,Wang, Ya,&Ren, Changliang.(2019).Efficient Direct Measurement of Arbitrary Quantum Systems via Weak Measurement.PHYSICAL REVIEW APPLIED,12(1),10.
MLA	Du, Jiangfeng,et al."Efficient Direct Measurement of Arbitrary Quantum Systems via Weak Measurement".PHYSICAL REVIEW APPLIED 12.1(2019):10.