A necessary and sufficient criterion for multipartite separable states

Details A necessary and sufficient criterion for multipartite separable states A necessary and sufficient criterion for multipartite separable states

2000-06-13

arxiv.org/abs/quant-ph/0006058v3

Phys. Lett. A 275(4), 244-249 (2000)

Physics

Quantum Physics

4 pages, Revtex

Scientific paper

10.1016/S0375-9601(00)00595-8

We present a necessary and sufficient condition for the separability of multipartite quantum states, this criterion also tells us how to write a multipartite separable state as a convex sum of separable pure states. To work out this criterion, we need to solve a set of equations, actually it is easy to solve these quations analytically if the density matrix of the given quantum state has few nonzero eigenvalues.

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