All entangled states are useful for channel discrimination

Marco Piani, John Watrous

Research output: Contribution to journalArticle

82 Citations (Scopus)

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.
Original languageEnglish
Article number250501
Number of pages4
JournalPhysical Review Letters
Volume102
Issue number25
DOIs
Publication statusPublished - 26 Jun 2009

Keywords

  • minimum-error
  • channel discrimination
  • entangled state

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