Finding out all locally indistinguishable sets of generalized Bell states

Jiang-Tao Yuan, Ying-Hui Yang, Cai-Hong Wang

In general, for a bipartite quantum system ${\mathbb{C}}^d\otimes {\mathbb{C}}^d$ and an integer $k$ such that $4\le k\le d$,there are few necessary and sufficient conditions for l…