How to construct entanglement witnesses

Details How to construct entanglement witnesses How to construct entanglement witnesses

2007-12-07

arxiv.org/abs/0712.1114v1

J. Phys. A: Math. Theor. 41 (2008) 145301

Physics

Quantum Physics

10 pages

Scientific paper

We present very simple method for constructing indecomposable entanglement witnesses out of a given pair -- an entanglement witness W and the corresponding state detected by W. This method may be used to produce new classes of atomic witnesses which are able to detect the `weakest' quantum entanglement. Actually, it works perfectly in the multipartite case, too. Moreover, this method provides a powerful tool for constructing new examples of bound entangled states.

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