Higher dimensional bipartite composite systems with the same density matrix: separable, free entangled, or PPT entangled?

Author: Cheng Wei   Xu Fang   Li Hua   Wang Gang  

Publisher: Springer Publishing Company

ISSN: 1570-0755

Source: Quantum Information Processing, Vol.13, Iss.4, 2014-04, pp. : 849-862

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