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Optimality for indecomposable entanglement witnesses

2014.07.23 15:48

실적년도	2012년
논문구분	국외
총저자	Kil-Chan Ha, Seung-Hyeok Kye
학술지명	Physical Review A - Atomic, Molecular, and Optical Physics
권(Vol.)	86
호(No.)	3
게재년월	2012년 9월
Impact Factor
SCI 등재	SCI
비고

We examine various notions related to the optimality for entanglement witnesses arising from Choi-type positive linear maps. We found examples of optimal entanglement witnesses which are nondecomposable but are not "nondecomposable optimal entanglement witnesses" in the sense of Lewenstein, Kraus, Cirac, and Horodecki. We suggest using the terms PPTES witness and optimal PPTES witness in place of "nondecomposable entanglement witness" and "nondecomposable optimal entanglement witnesses" in order to avoid possible confusion. Here, PPTES refers entangled states with positive partial transposes. We also found examples of nonextremal optimal entanglement witnesses which are indecomposable.

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