Quantum state separation, unambiguous discrimination and exact cloning

A. Chefles, S.M. Barnett

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Unambiguous discrimination and exact cloning reduce the square-overlap between quantum states, exemplifying the more general type of procedure we term state separation. We obtain the maximum probability with which two equiprobable quantum states can be separated by an arbitrary degree, and find that the established bounds on the success probabilities for discrimination and cloning are special cases of this general bound. The latter also gives the maximum probability of successfully producing N exact copies of a quantum system whose state is chosen secretly from a known pair, given M initial realizations of the state, where N > M. We also discuss the relationship between this bound and that on unambiguous state discrimination.
LanguageEnglish
Pages10097-10103
Number of pages6
JournalJournal of Physics A: Mathematical and Theoretical
Volume31
Issue number50
DOIs
Publication statusPublished - 1998

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Cloning
Quantum State
Discrimination
discrimination
Quantum Systems
Overlap
Arbitrary
Term

Keywords

  • quantum state separation
  • exact cloning
  • physics
  • quantum states

Cite this

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Quantum state separation, unambiguous discrimination and exact cloning. / Chefles, A.; Barnett, S.M.

In: Journal of Physics A: Mathematical and Theoretical, Vol. 31, No. 50, 1998, p. 10097-10103.

Research output: Contribution to journalArticle

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