Retrodictive fidelities for pure state postselectors

Research output: Contribution to journalArticle

5 Citations (Scopus)

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.
LanguageEnglish
Pages1-11
Number of pages11
JournalNew Journal of Physics
Volume8
Issue number268
DOIs
Publication statusPublished - 9 Nov 2006

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quantum computation
logic
preparation
detectors

Keywords

  • fidelity
  • optics
  • retrodictive
  • optical computing
  • quantum computing

Cite this

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Retrodictive fidelities for pure state postselectors. / Jeffers, J.

In: New Journal of Physics, Vol. 8, No. 268, 09.11.2006, p. 1-11.

Research output: Contribution to journalArticle

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