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Phys Rev Lett. 2003 Jan 31;90(4):043602. Epub 2003 Jan 31.

Nonlocal pulse shaping with entangled photon pairs.

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  • 1Istituto Nazionale di Ottica Applicata, Largo E. Fermi, 6, I-50125, Florence, Italy.

Abstract

Nonlocal shaping effects in the time or spectral profiles of an entangled photon pair emerging from a pulsed parametric down-converter are observed by spectrally or temporally filtering one of the twin beams. In particular, we demonstrate the appearance of fourth-order ("ghost") interference fringes in the spectrum of one beam conditioned by photodetection at the output of an unbalanced Michelson interferometer placed in the path of the other beam. The coherence time of the pump is the limiting factor for the sharpness of the details in the shaped biphoton spectrum.

PMID:
12570422
[PubMed]
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