Quantum state discrimination

Stephen M. Barnett, Sarah Croke

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168 Citations (Scopus)

Abstract

It is a fundamental consequence of the superposition principle for quantum states that there must exist nonorthogonal states, that is, states that, although different, have a nonzero overlap. This finite overlap means that there is no way of determining with certainty in which of two such states a given physical system has been prepared. We review the various strategies that have been devised to discriminate optimally between nonorthogonal states and some of the optical experiments that have been performed to realize these.
Original languageEnglish
Pages (from-to)238-278
Number of pages41
JournalAdvances in Optics and Photonics
Volume1
Issue number2
DOIs
Publication statusPublished - 1 Apr 2009

Keywords

  • quantum communications
  • quantum information
  • quantum processing

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