Bipartite subspaces having no LOCC-distinguishable bases

@inproceedings{Watrous2005BipartiteSH,
  title={Bipartite subspaces having no LOCC-distinguishable bases},
  author={John Watrous},
  year={2005}
}
It is proved that there exist subspaces of bipartite tensor product spaces that have no or-thonormal bases that can be perfectly distinguished by means of LOCC protocols. A corollary of this fact is that there exist quantum channels having sub-optimal classical capacity even when the receiver may communicate classically with a third party that represents the channel's environment. 
9 Citations
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