Detection of genuinely entangled and non-separable $n$-partite quantum states

Details Detection of genuinely entangled and non-separable $n$-partite quantum states Detection of genuinely entangled and non-separable $n$-partite quantum states

2010-07-26

arxiv.org/abs/1007.4493v2

Physical Review A 82, 062113 (2010)

Physics

Quantum Physics

8 pages, one figure

Scientific paper

10.1103/PhysRevA.82.062113

We investigate the detection of entanglement in $n$-partite quantum states. We obtain practical separability criteria to identify genuinely entangled and non-separable mixed quantum states. No numerical optimization or eigenvalue evaluation is needed, and our criteria can be evaluated by simple computations involving components of the density matrix. We provide examples in which our criteria perform better than all known separability criteria. Specifically, we are able to detect genuine $n$-partite entanglement which has previously not been identified. In addition, our criteria can be used in today's experiment.

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