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论文类型：期刊论文

发表时间：2008-03-01

发表刊物：PHYSICAL REVIEW A

收录刊物：SCIE、EI

卷号：77

期号：3

ISSN号：1050-2947

摘要：An interesting monogamy equation with the form of the Pythagorean theorem is found for 2 circle times 2 circle times n-dimensional pure states, which reveals the relation among bipartite concurrence, concurrence of assistance, and genuine tripartite entanglement. At the same time, a genuine tripartite entanglement monotone as a generalization of 3-tangle is naturally obtained for (2 circle times 2 circle times n)-dimensional pure states in terms of a distinct idea. For mixed states, the monogamy equation is reduced to a monogamy inequality. Both results for tripartite quantum states can be employed to multipartite quantum states.