No-signaling bound on quantum state discrimination

Sarah Croke, Erika Andersson, Stephen M. Barnett

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Quantum correlations do not allow signaling, and any operation which may be performed on one system of an entangled pair cannot be detected by measurement of the other system alone. This no-signaling condition limits allowed operations and, in the context of quantum communication, may be used to put bounds on quantum state discrimination. We find that the natural figure of merit to consider is the confidence in identifying a state, which is optimized by the maximum confidence strategy. We show that this strategy may be derived from the no-signaling condition, and demonstrate the relationship between maximum confidence measurements and entanglement concentration.
LanguageEnglish
Pages012113-012118
Number of pages5
JournalPhysical Review A
Volume77
Issue number1
DOIs
Publication statusPublished - 28 Jan 2008

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discrimination
confidence
quantum communication
figure of merit

Keywords

  • quantum correlation
  • signaling
  • no-signaling
  • quantum communication
  • quantum state
  • physics

Cite this

Croke, S., Andersson, E., & Barnett, S. M. (2008). No-signaling bound on quantum state discrimination. Physical Review A, 77(1), 012113-012118. https://doi.org/10.1103/PhysRevA.77.012113
Croke, Sarah ; Andersson, Erika ; Barnett, Stephen M. / No-signaling bound on quantum state discrimination. In: Physical Review A. 2008 ; Vol. 77, No. 1. pp. 012113-012118.
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Croke, S, Andersson, E & Barnett, SM 2008, 'No-signaling bound on quantum state discrimination' Physical Review A, vol. 77, no. 1, pp. 012113-012118. https://doi.org/10.1103/PhysRevA.77.012113

No-signaling bound on quantum state discrimination. / Croke, Sarah; Andersson, Erika; Barnett, Stephen M.

In: Physical Review A, Vol. 77, No. 1, 28.01.2008, p. 012113-012118.

Research output: Contribution to journalArticle

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