Extended phase-matching conditions for improved entanglement generation
Vittorio Giovannetti, Lorenzo Maccone, Jeffrey H. Shapiro, Franco N. C. Wong
Abstract
Extended phase-matching conditions for spontaneous parametric down-conversion are examined. By augmenting the conventional phase-matching conditions, they permit the creation of a class of frequency-entangled states that generalizes the usual twin-beam biphoton state. An experimental characterization of these states is possible through interferometric coincidence counting.
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