Practical purification scheme for decohered coherent-state superpositions via partial homodyne detection

Shigenari Suzuki, Masahiro Takeoka, Masahide Sasaki, Ulrik L. Andersen, Fumihiko Kannari

    研究成果: Article

    19 引用 (Scopus)

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    We present a simple protocol to purify a coherent-state superposition that has undergone a linear lossy channel. The scheme constitutes only a single beam splitter and a homodyne detector, and thus is experimentally feasible. In practice, a superposition of coherent states is transformed into a classical mixture of coherent states by linear loss, which is usually the dominant decoherence mechanism in optical systems. We also address the possibility of producing a larger amplitude superposition state from decohered states, and show that in most cases the decoherence of the states are amplified along with the amplitude.

    元の言語English
    記事番号042304
    ジャーナルPhysical Review A - Atomic, Molecular, and Optical Physics
    73
    発行部数4
    DOI
    出版物ステータスPublished - 2006 4 14

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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