Partial Bell-State Analysis with Parametric down Conversion in the Wigner Function Formalism

<table>Setup for quantum dense coding. The polarization rotator and the wave retarder used by Bob allow a transmission to Alice of any of the Bell-states. Alice’s station consists on a balanced beam-splitter, two polaryzing beam-splitters, and detectors DH1, DV1, DH2, and DV2.</table>

Advances in Mathematical Physics

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Figure 1

Figure 1: Partial Bell-State Analysis with Parametric down Conversion in the Wigner Function Formalism 