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Optimum detection for extracting maximum information from symmetric qubit sets

Mizuno, Jun and Fujiwara, Mikio and Akiba, Makoto and Kawanishi, Tetsuya and Barnett, Stephen M. and Sasaki, Masahide (2001) Optimum detection for extracting maximum information from symmetric qubit sets. Physical Review A, 65 (1). 012315-1. ISSN 1050-2947

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    Abstract

    We demonstrate a class of optimum detection strategies for extracting the maximum information from sets of equiprobable real symmetric qubit states of a single photon. These optimum strategies have been predicted by Sasaki et al. [Phys. Rev. A 59, 3325 (1999)]. The peculiar aspect is that the detections with at least three outputs suffice for optimum extraction of information regardless of the number of signal elements. The cases of ternary (or trine), quinary, and septenary polarization signals are studied where a standard von Neumann detection (a projection onto a binary orthogonal basis) fails to access the maximum information. Our experiments demonstrate that it is possible with present technologies to attain about 96% of the theoretical limit.

    Item type: Article
    ID code: 5861
    Keywords: symmetric qubit sets, detection strategies, photons, von Neumann, optical physics, optics, Optics. Light, Atomic and Molecular Physics, and Optics
    Subjects: Science > Physics > Optics. Light
    Department: Faculty of Science > Physics
    Related URLs:
    Depositing user: Miss Darcy Spiller
    Date Deposited: 30 Apr 2008
    Last modified: 05 Sep 2014 13:13
    URI: http://strathprints.strath.ac.uk/id/eprint/5861

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