A Class of Bell Diagonal States and Entanglement Witnesses
Dariusz Chruściński, Andrzej Kossakowski, Krzysztof Młodawski, Takashi Matsuoka · Open Systems & Information Dynamics · 2010
We analyze special class of bipartite states — so-called Bell diagonal states. In particular, we provide new examples of bound entangled Bell diagonal states and construct the class of entanglement witnesses diagonal in the magic basis.