Criteria of partial separability of multipartite qubit mixed-states

Details Criteria of partial separability of multipartite qubit mixed-states Criteria of partial separability of multipartite qubit mixed-states

2004-09-27

arxiv.org/abs/quant-ph/0409182v2

Inter. J. Quant. Inform. 3(2005)395

Physics

Quantum Physics

13 pages, no figure, the revision of quant-ph/0403173

Scientific paper

In this paper, we discuss the partial separability and its criteria problems of multipartite qubit mixed-states. First we strictly define what is the partial separability of a multipartite qubit system. Next we give a reduction way from N-partite qubit density matrixes to bipartite qubit density matrixes, and prove a necessary condition that a N-partite qubit mixed-state to be partially separable is its reduction to satisfy the PPT condition. PACC numbers: 03.67.Mn; 03.65.Ud; 03.67.Hk

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