Bipartite subspaces having no LOCC-distinguishable bases

John Watrous

doi:10.1103/PhysRevLett.95.080505

Bipartite subspaces having no LOCC-distinguishable bases

Quantum Physics 2013-05-29 v2

Authors: John Watrous

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Abstract

It is proved that there exist subspaces of bipartite tensor product spaces that have no orthonormal 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.

Keywords

entanglement and local operations quantum channel capacity

Cite

@article{arxiv.quant-ph/0503092,
  title  = {Bipartite subspaces having no LOCC-distinguishable bases},
  author = {John Watrous},
  journal= {arXiv preprint arXiv:quant-ph/0503092},
  year   = {2013}
}

Comments

12 pages. Two references added in version 2

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