Full separability criterion for tripartite quantum systems
Department of Physics, Dalian University of Technology, 116024, Dalian, P.R. China
Corresponding author: a email@example.com
Revised: 14 October 2006
Published online: 13 December 2006
In this paper, an intuitive approach is employed to generalize the full separability criterion of tripartite quantum states of qubits to the higher-dimensional systems [Phys. Rev. A 72, 022333 (2005)]. A distinct characteristic of the present generalization is that less restrictive conditions are needed to characterize the properties of full separability. Furthermore, the formulation for pure states can be conveniently extended to the case of mixed states by utilizing the Kronecker product approximate technique. As applications, we give the analytic approximation of the criterion for weakly mixed tripartite quantum states and investigate the full separability of some weakly mixed states.
PACS: 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.) / 03.67.Mn – Entanglement production, characterization, and manipulation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006