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论文类型：期刊论文

发表时间：2016-01-01

发表刊物：INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS

收录刊物：SCIE、Scopus

卷号：55

期号：1

页面范围：62-70

ISSN号：0020-7748

关键字：Quantum correlation; Skew information; Weak measurement

摘要：The quantum correlation under weak measurements is studied via skew information. For 2 x d-dimensional states, it can be given by a closed form which linearly depends on the quantum correlation [EPL. 107 (2014) 10007] determined by the strength of the weak measurement. It is found that the quantum correlation under weak measurements only captures partial quantumness of the state. In particular, the extraction of the residual quantumness by the latter measurements will inevitably destroy too much quantumness. To demonstration, the Werner state is given as an example.