All entangled states are useful for channel discrimination

Details All entangled states are useful for channel discrimination All entangled states are useful for channel discrimination

2009-01-15

arxiv.org/abs/0901.2118v2

Phys. Rev. Lett. 102, 250501 (2009)

Physics

Quantum Physics

5 pages, more similar to the published version

Scientific paper

10.1103/PhysRevLett.102.250501

We prove that every entangled state is useful as a resource for the problem of minimum-error channel discrimination. More specifically, given a single copy of an arbitrary bipartite entangled state, it holds that there is an instance of a quantum channel discrimination task for which this state allows for a correct discrimination with strictly higher probability than every separable state.

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