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论文类型：期刊论文

发表时间：2004-12-13

发表刊物：PHYSICS LETTERS A

收录刊物：SCIE

卷号：333

期号：5-6

页面范围：364-370

ISSN号：0375-9601

关键字：entanglement measure; multipartite entanglement; concurrence vector

摘要：In this Letter, based on the generalization of concurrence vectors for bipartite pure state with respect to employing tensor product of generators of the corresponding rotation groups, we generalize concurrence vectors to the case of mixed states; a new criterion of separability of multipartite pure states is given out, for which we define a concurrence vector; we generalize the vector to the case of multipartite mixed state and give out a good measure of free entanglement. (C) 2004 Published by Elsevier B.V.