Measurement does not always aid state discrimination

Kieran Hunter

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)
27 Downloads (Pure)


We have investigated the problem of discriminating between nonorthogonal quantum states with the least probability of error. We have determined that the best strategy for some sets of states is to make no measurement at all and simply to always assign the most commonly occurring state. Conditions that describe such sets of states have been derived.
Original languageEnglish
Pages (from-to)012306/1-012306/3
Number of pages3
JournalPhysical Review A
Issue number1
Publication statusPublished - 9 Jul 2003


  • quantum states
  • nonorthogonal quantum states
  • probability
  • quantum
  • physics


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