A linear 50/50 beamsplitter, together with a coincidence measurement, has been widely used in quantum optical experiments, such as teleportation, dense coding, etc., for interferometrically distinguishing, measuring, or projecting onto one of the four two-photon polarization Bell-states |/spl Psi//sup (-)/>. In this paper, we demonstrate that the coincidence measurement at the output of a beamsplitter cannot be used as an absolute identifier of the input state |/spl Psi//sup (-)/> nor as an indication that the input photons have projected to the |/spl Psi//sup (-)/> state.


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    Titel :

    Reliability of the beamsplitter based Bell-state measurement


    Beteiligte:
    Yoon-Ho Kim, (Autor:in) / Grice, W.P. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.01.2005


    Format / Umfang :

    2124552 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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