连贯性(哲学赌博策略)
连贯度
相干理论
量子
度量(数据仓库)
量子力学
统计物理学
量子不和谐
量子态
物理
可见的
歪斜
计算机科学
开放量子系统
相干长度
数据挖掘
超导电性
天文
出处
期刊:Physical review
日期:2017-04-25
卷期号:95 (4)
被引量:162
标识
DOI:10.1103/physreva.95.042337
摘要
Quantifying coherence is a key task in both quantum mechanical theory and practical applications. Here, a reliable quantum coherence measure is presented by utilizing the quantum skew information of the state of interest subject to a certain broken observable. This coherence measure is proven to fulfill all the criteria (especially the strong monotonicity) recently introduced in the resource theories of quantum coherence. The coherence measure has an analytic expression and an obvious operational meaning related to quantum metrology. In terms of this coherence measure, the distribution of the quantum coherence, i.e., how the quantum coherence is distributed among the multiple parties is studied and a corresponding polygamy relation is proposed. As a further application, it is found that the coherence measure forms the natural upper bounds for quantum correlations prepared by incoherent operations. The experimental measurement of our coherence measure as well as the relative-entropy coherence, $l_p$-norm coherence is studied finally.
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