All entangled states are useful for channel discrimination
Quantum Physics
2009-07-17 v2
Abstract
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.
Cite
@article{arxiv.0901.2118,
title = {All entangled states are useful for channel discrimination},
author = {M. Piani and J. Watrous},
journal= {arXiv preprint arXiv:0901.2118},
year = {2009}
}
Comments
5 pages, more similar to the published version