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. 2016 May 23;6:26523. doi: 10.1038/srep26523

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Inline graphic — Photon pairs are mixed on a beam splitter (BS) with transmissivity T. Field in one output port of this beam splitter is combined with the vacuum |0〉 at another balanced beam splitter. LNIs and EIs I_ent(jk) characterized the three output fields.

Inline graphic — Photon pairs are mixed on a beam splitter (BS) with transmissivity T. Field in one output port of this beam splitter is combined with the vacuum |0〉 at another balanced beam splitter. LNIs and EIs I_ent(jk) characterized the three output fields.