No-signaling, entanglement-breaking, and localizability in bipartite channels

Details No-signaling, entanglement-breaking, and localizability in bipartite channels No-signaling, entanglement-breaking, and localizability in bipartite channels

2010-07-07

arxiv.org/abs/1007.1177v2

Phys. Rev. Lett. 106, 010501 (2011)

Physics

Quantum Physics

4 pages, revtex4

Scientific paper

10.1103/PhysRevLett.106.010501

A bipartite quantum channel represents the interaction between systems, generally allowing for exchange of information. A special class of bipartite channels are the no-signaling ones, which do not allow communication. In Ref. [1] it has been conjectured that all no-signaling channels are mixtures of entanglement-breaking and localizable channels, which require only local operations and entanglement. Here we provide the general realization scheme, giving a counterexample to the conjecture.

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