No-signaling bound on quantum state discrimination

Croke, Sarah and Andersson, Erika and Barnett, Stephen M. (2008) No-signaling bound on quantum state discrimination. Physical Review A, 77 (1). 012113-012118. ISSN 1050-2947 (https://doi.org/10.1103/PhysRevA.77.012113)

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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.

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• Item metadata

  Item type:	Article
  ID code:	6446
  Dates:	Date Event 28 January 2008 Published
  Subjects:	Science > Physics > Optics. Light Science > Physics
  Department:	Faculty of Science > Physics
  Depositing user:	Miss Darcy Spiller
  Date deposited:	07 Jul 2008
  Last modified:	11 Nov 2024 08:53
  URI:	https://strathprints.strath.ac.uk/id/eprint/6446