南方科技大学知识苑(SUSTech KC): Towards the standardization of quantum state verification using optimal strategies

题名	Towards the standardization of quantum state verification using optimal strategies
作者	Jiang，Xinhe 1; Wang，Kun 2 ; Qian，Kaiyi 1; Chen，Zhaozhong 1; Chen，Zhiyu 1; Lu，Liangliang 1; Xia，Lijun 1; Song，Fangmin 1; Zhu，Shining 1; Ma，Xiaosong 1
通讯作者	Ma，Xiaosong
发表日期	2020-12-01
DOI	10.1038/s41534-020-00317-7
发表期刊	npj Quantum Information 影响因子和分区
ISSN	2056-6387
EISSN	2056-6387
卷号	6 期号:1
摘要	Quantum devices for generating entangled states have been extensively studied and widely used. As so, it becomes necessary to verify that these devices truly work reliably and efficiently as they are specified. Here we experimentally realize the recently proposed two-qubit entangled state verification strategies using both local measurements (nonadaptive) and active feed-forward operations (adaptive) with a photonic platform. About 3283/536 number of copies (N) are required to achieve a 99% confidence to verify the target quantum state for nonadaptive/adaptive strategies. These optimal strategies provide the Heisenberg scaling of the infidelity ϵ as a function of N (ϵ~ N) with the parameter r = −1, exceeding the standard quantum limit with r = −0.5. We experimentally obtain the scaling parameters of r = −0.88 ± 0.03 and −0.78 ± 0.07 for nonadaptive and adaptive strategies, respectively. Our experimental work could serve as a standardized procedure for the verification of quantum states.
相关链接	[Scopus记录]
收录类别	SCI ; EI
语种	英语
学校署名	其他
资助项目	National Key Research and Development Program of China[2017YFA0303704][2019YFA0308704] ; National Natural Science Foundation of China[11674170][11690032] ; Natural Science Foundation of Jiangsu Province[BK20170010] ; Leadingedge technology Program of Jiangsu Natural Science Foundation[BK20192001] ; NSFC-BRICS[61961146001]
WOS研究方向	Physics
WOS类目	Quantum Science & Technology ; Physics, Applied ; Physics, Atomic, Molecular & Chemical ; Physics, Condensed Matter
WOS记录号	WOS:000588394300002
出版者	NATURE RESEARCH
EI入藏号	20204409418868
EI主题词	Optimal systems ; Quantum optics ; Quantum entanglement
EI分类号	Light/Optics:741.1 ; Codes and Standards:902.2 ; Quantum Theory; Quantum Mechanics:931.4 ; Systems Science:961
Scopus记录号	2-s2.0-85094138186
来源库	Scopus
引用统计	被引频次[WOS]：19
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/209096
专题	量子科学与工程研究院理学院_物理系
作者单位	1.National Laboratory of Solid-state Microstructures,School of Physics,Collaborative Innovation Center of Advanced Microstructures,State Key Laboratory for Novel Software Technology,Department of Computer Science and Technology,Nanjing University,Nanjing,210093,China 2.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
推荐引用方式 GB/T 7714	Jiang，Xinhe,Wang，Kun,Qian，Kaiyi,et al. Towards the standardization of quantum state verification using optimal strategies[J]. npj Quantum Information,2020,6(1).
APA	Jiang，Xinhe.,Wang，Kun.,Qian，Kaiyi.,Chen，Zhaozhong.,Chen，Zhiyu.,...&Ma，Xiaosong.(2020).Towards the standardization of quantum state verification using optimal strategies.npj Quantum Information,6(1).
MLA	Jiang，Xinhe,et al."Towards the standardization of quantum state verification using optimal strategies".npj Quantum Information 6.1(2020).