Retrodictive fidelities for pure state postselectors

Jeffers, J. (2006) Retrodictive fidelities for pure state postselectors. New Journal of Physics, 8 (268). pp. 1-11. ISSN 1367-2630 (https://doi.org/10.1088/1367-2630/8/11/268)

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Abstract

Two measures of fidelity are proposed for postselecting devices, the retrodictive conditional probability that the state in the measurement arm is the one indicated by the detectors, and the probability that the device produces the state that it would produce if working perfectly. The first is the natural quantity that one wishes to maximize to improve the device operation. The second corresponds more closely with the accurate operation of the device than the more usual overlap-based fidelity. The results are particularly applicable to the types of state preparation and logic gate operation in linear optical quantum computing.

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• Item metadata

  Item type:	Article
  ID code:	4722
  Dates:	Date Event 9 November 2006 Published
  Subjects:	Science > Physics > Optics. Light
  Department:	Faculty of Science > Physics
  Depositing user:	Strathprints Administrator
  Date deposited:	23 Jul 2008
  Last modified:	08 Apr 2024 16:07
  URI:	https://strathprints.strath.ac.uk/id/eprint/4722