Asymptotically perfect discrimination in the LOCC paradigm

Details Asymptotically perfect discrimination in the LOCC paradigm Asymptotically perfect discrimination in the LOCC paradigm

2011-05-25

arxiv.org/abs/1105.5132v2

Phys. Rev. A 84, 042326 (2011)

Physics

Quantum Physics

7 pages, 3 trees; v2: minor corrections & improvements

Scientific paper

10.1103/PhysRevA.84.042326

We revisit the problem of discriminating orthogonal quantum states within the local quantum operation and classical communication (LOCC) paradigm. Our particular focus is on the asymptotic situation where the parties have infinite resources and the protocol may become arbitrarily long. Our main result is a necessary condition for perfect asymptotic LOCC discrimination. As an application, we prove that for complete product bases, unlimited resources are of no advantage. On the other hand, we identify an example, for which it still remains undecided whether unlimited resources are superior.

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