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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
Depositing user: Strathprints Administrator
Date Deposited: 23 Jul 2008
Last modified: 15 Apr 2015 12:29
Related URLs:
URI: http://strathprints.strath.ac.uk/id/eprint/4722

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