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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

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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.

    Item type: Article
    ID code: 4722
    Keywords: fidelity, optics, retrodictive, optical computing, quantum computing, Optics. Light, Physics and Astronomy(all)
    Subjects: Science > Physics > Optics. Light
    Department: Faculty of Science > Physics
    Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 23 Jul 2008
    Last modified: 05 Sep 2014 00:06
    URI: http://strathprints.strath.ac.uk/id/eprint/4722

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