KMS Of Academy of mathematics and systems sciences, CAS
| From quantum coherence to quantum correlations | |
Sun, Yuan1; Mao, Yuanyuan; Luo, Shunlong
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| 2017-06-01 | |
| Source Publication | EPL
 |
| ISSN | 0295-5075 |
| Volume | 118Issue:6Pages:7 |
| Abstract | 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 |
| Language | 英语 |
| Funding Project | 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 Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| WOS ID | WOS:000418889300003 |
| Publisher | EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.amss.ac.cn/handle/2S8OKBNM/27050 |
| Collection | 应用数学研究所 |
| Corresponding Author | Sun, Yuan |
| Affiliation | 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 |
| Recommended Citation 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. |
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