A class of Bell diagonal entanglement witnesses in ${\mathbb{C}}^4\otimes {\mathbb{C}}^4$: optimization and the spanning property

Anindita Bera, Filip A. Wudarski, Gniewomir Sarbicki +1

Two classes of Bell diagonal indecomposable entanglement witnesses in ${\mathbb{C}}^4\otimes {\mathbb{C}}^4$ are considered. Within the first class, we find a generalization of the we…