Experimental demonstration of optimal unambiguous state discrimination

Roger B.M. Clarke, Anthony Chefles, Stephen M. Barnett, Erling Riis

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Abstract

We present a full demonstration of unambiguous state discrimination between nonorthogonal quantum states. Using a free-space interferometer we have realized the optimum quantum measurement scheme for two nonorthogonal states of light, known as the Ivanovic-Dieks-Peres (IDP) measurement. We have gained access to all three possible outcomes of this measurement. All aspects of this generalized measurement scheme, including its superiority over a standard von Neumann measurement, have been demonstrated within 1.5% of the IDP predictions.
Original languageEnglish
Pages (from-to)040305-1-040305-4
JournalPhysical Review A
Volume63
Issue number4
DOIs
Publication statusPublished - 21 Mar 2001

Keywords

  • optics
  • quantum physics
  • optimal unambiguous state discrimination
  • Ivanovic-Dieks-Peres measurement

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