Detection power of separability criteria based on a correlation tensor is tested within a family of generalized isotropic state in d1⊗d2. For d1≠d2 all these criteria are weaker than positive partial transposition (PPT) criterion. Interestingly, our …
It is shown that the enhanced (nonlinear) realignment criterion is equivalent to the family of linear criteria based on correlation tensor. These criteria generalize the original (linear) realignment criterium and give rise to the family of …
A family of separability criteria based on correlation matrix (tensor) is provided. Interestingly, it unifies several criteria known before like, e.g., computable cross-norm or realignment criterion (CNNR), de Vicente criterion, and derived recently …