From quantum coherence to quantum correlations

doi:10.1209/0295-5075/118/60007

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	From quantum coherence to quantum correlations
	Sun, Yuan 1; Mao, Yuanyuan ; Luo, Shunlong
	2017-06-01
发表期刊	EPL
ISSN	0295-5075
卷号	118 期号:6 页码:7
摘要	In quantum mechanics, quantum coherence of a state relative to a quantum measurement can be identified with the quantumness that has to be destroyed by the measurement. In particular, quantum coherence of a bipartite state relative to a local quantum measurement encodes quantum correlations in the state. If one takes minimization with respect to the local measurements, then one is led to quantifiers which capture quantum correlations from the perspective of coherence. In this vein, quantum discord, which quantifies the minimal correlations that have to be destroyed by quantum measurements, can be identified as the minimal coherence, with the coherence measured by the relative entropy of coherence. To advocate and formulate this idea in a general context, we first review coherence relative to Luders measurements which extends the notion of coherence relative to von Neumann measurements (or equivalently, orthonomal bases), and highlight the observation that quantum discord arises as minimal coherence through two prototypical examples. Then, we introduce some novel measures of quantum correlations in terms of coherence, illustrate them through examples, investigate their fundamental properties and implications, and indicate their applications to quantum metrology. Copyright (C) EPLA, 2017
DOI	10.1209/0295-5075/118/60007
语种	英语
资助项目	National Center for Mathematics and Interdisciplinary Sciences, Chinese Academy of Sciences[Y029152K51] ; Key Laboratory of Random Complex Structures and Data Science, Chinese Academy of Sciences[2008DP173182]
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000418889300003
出版者	EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/27050
专题	应用数学研究所
通讯作者	Sun, Yuan
作者单位	1.Chinese Acad Sci, Acad Math & Syst Sci, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Math Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Sun, Yuan,Mao, Yuanyuan,Luo, Shunlong. From quantum coherence to quantum correlations[J]. EPL,2017,118(6):7.
APA	Sun, Yuan,Mao, Yuanyuan,&Luo, Shunlong.(2017).From quantum coherence to quantum correlations.EPL,118(6),7.
MLA	Sun, Yuan,et al."From quantum coherence to quantum correlations".EPL 118.6(2017):7.