Separability of Multi-Partite Quantum States

Details Separability of Multi-Partite Quantum States Separability of Multi-Partite Quantum States

2008-07-31

arxiv.org/abs/0807.5003v1

J. Phys. A: Math. Theor. 41 (2008) 395302

Physics

Quantum Physics

13 pages

Scientific paper

We give a direct tensor decomposition for any density matrix into Hermitian operators. Based upon the decomposition we study when the mixed states are separable and generalize the separability indicators to multi-partite states and show that a density operator is separable if and only if the separable indicator is non-negative. We then derive two bounds for the separable indicator in terms of the spectrum of the factor operators in the tensor summands.

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