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论文类型：期刊论文

发表时间：2013-10-01

发表刊物：INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS

收录刊物：SCIE、Scopus

卷号：52

期号：10

页面范围：3676-3682

ISSN号：0020-7748

关键字：Nondestructive probing; Quantum correlation; Classical correlation; Entanglement

摘要：We study a scheme that an auxiliary qubit is introduced for probing the information of the given bipartite quantum state, while the correlations of the probed quantum state and even the probed state itself are not disturbed after the probing, which means nondestructive probing. We find that, in order to guarantee the invariance of the correlations of the probed state, neither quantum entanglement nor quantum discord between the auxiliary qubit and the probed states can be present. This could make us reconsider the role of quantum correlation in some quantum information processing tasks.