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A bridge between the single-photon and squeezed-vacuum states
The two modes of the Einstein-Podolsky-Rosen quadrature entangled state generated by parametric down-conversion interfere on a beam splitter of variable splitting ratio. Detection of a photon in one of the beam splitter output channels heralds preparation of a signal state in the other, which is characterized using homodyne tomography. By controlling the beam splitting ratio, the signal state can be chosen anywhere between the single-photon and squeezed state.doi:10.1364/oe.18.018254 pmid:20721217 fatcat:4bigv5ix6rgkzmy53ppa7o4siq