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Browsing by Author "Odate, Satoru"

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    Purification of single qubits by collinear photons
    (2007-03-01)
    Odate, Satoru
    ;
    Takeno, Yuishi
    ;
    Kobayashi, Takayoshi
    ;
    電子物理學系
    ;
    Department of Electrophysics
    We have demonstrated purification of a single qubit by two collinear photons, one of which was time-delayed. Our method can be applied to a single qubit many times, and the qubit can be purified to an arbitrarily high degree of purity. Thus, by repeating this method we can make the statistical error that single qubits incur along a transmission channel much smaller.