Fig. 4
From: A mirrored pair of optimal non-decomposable entanglement witnesses for two qudits does exist
These graphics show two different slices through the magic simplex42,43,45 for dimension \(d=5\). The (blue) area covers all PPT states. The state space is symmetric in the parametrization \(\alpha ,\beta\), however, the PPT property is only in (b) symmetric. The pair of EWs (red/brown) are depicted, and for (a) we find that both detect bound entangled states, whereas in (b) only one detects bound entangled states.
