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

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

    Research output: Contribution to journalArticle

    19 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Article number042304
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Volume73
    Issue number4
    DOIs
    Publication statusPublished - 2006 Apr 14

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Fingerprint Dive into the research topics of 'Practical purification scheme for decohered coherent-state superpositions via partial homodyne detection'. Together they form a unique fingerprint.

  • Cite this