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论文类型：期刊论文

发表时间：2014-07-01

发表刊物：EPL

收录刊物：SCIE、Scopus

卷号：107

期号：1

ISSN号：0295-5075

摘要：Quantum correlation with a novel definition is presented for an arbitrary bipartite quantum state in terms of the skew information of the complete set of rank-one orthogonal projectors. This definition not only inherits the good properties of skew information including the contractivity, but also shows a powerful analytic computability for a large range of states. In addition, the measure for a general state can be easily numerically obtained by the well-developed technique of the approximate joint diagonalization. As a comparison, we give both the analytic and the numerical quantum correlation for many high-dimensional states. The relation between our measure and quantum metrology is also analyzed. Copyright (C) EPLA, 2014