Nonclassical mesoscopic twin-beam of light

M. Bondani; A. Allevi; G. Zambra; M. G. A. Paris; A. Andreoni; J. Peřina; J. Křepelka; J. Peřina Jr.

doi:10.1117/12.732466

25 September 2007 Nonclassical mesoscopic twin-beam of light

M. Bondani, A. Allevi, G. Zambra, M. G. A. Paris, A. Andreoni, J. Peřina, J. Křepelka, J. Peřina Jr.

Proceedings Volume 6710, Quantum Communications and Quantum Imaging V; 671004 (2007) https://doi.org/10.1117/12.732466
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

We demonstrate, by direct measurement of the number of photons in signal and idler, that the twin-beam of light produced by ps-pulsed spontaneous parametric downconversion is endowed with sub-shot-noise photon-number correlations in a mesoscopic intensity regime (more than 1000 detected photons). The noise reduction, calculated from the variance of the difference in the numbers of detected-photons, resulted to be 3.25 dB below the shot-noise level. From experimental data we can recover joint photon-number distribution and a negative-valued joint signal-idler quasi-distributions of integrated intensities, which demonstrates the nonclassical character of the generated field.

Citation Download Citation

M. Bondani, A. Allevi, G. Zambra, M. G. A. Paris, A. Andreoni, J. Peřina, J. Křepelka, and J. Peřina Jr. "Nonclassical mesoscopic twin-beam of light", Proc. SPIE 6710, Quantum Communications and Quantum Imaging V, 671004 (25 September 2007); https://doi.org/10.1117/12.732466

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