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.
- Received 20 January 2009
DOI:https://doi.org/10.1103/PhysRevLett.102.250501
©2009 American Physical Society