Optimal entanglement witnesses from generalized reduction and Robertson maps
arXiv:1012.1124 · doi:10.1088/1751-8113/44/16/165304
Abstract
We provide a generalization of the reduction and Robertson positive maps in matrix algebras. They give rise to a new class of optimal entanglement witnesses. Their structural physical approximation is analyzed. As a byproduct we provide a new examples of PPT (Positive Partial Transpose) entangled states.
14 pages