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Description
  • Přímým měřením počtu fotonů signálového a jalového svazku v párových svazcích světla vytvořených ps-pulsní spontánní parametrickou sestupnou konverzí se demonstrují korelace v počtech fotonů pod úrovní výstřelového šumu v mesoskopickém intenzitním režimu (detekováno přes 1000 fotonů). Snížení šumu spočtené z variance rozdílu v počtu detekovaných fotonů leží o 3,25 dB pod hladinou výstřelového šumu. Z experimentálních dat je rekonstruováno společné rozdělení počtu fotonů a také společná kvazidistribuce integrované intenzity, jejíž záporná hodnota prokazuje neklasický charakter generovaného pole. (cs)
  • 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.
  • 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. (en)
Title
  • Nonclassical mesoscopic twin-beam of light
  • Neklasické mesoskopické párové svazky světla (cs)
  • Nonclassical mesoscopic twin-beam of light (en)
skos:prefLabel
  • Nonclassical mesoscopic twin-beam of light
  • Neklasické mesoskopické párové svazky světla (cs)
  • Nonclassical mesoscopic twin-beam of light (en)
skos:notation
  • RIV/68378271:_____/07:00310274!RIV09-AV0-68378271
http://linked.open...avai/riv/aktivita
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  • P(1M06002), Z(AV0Z10100522)
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  • 437460
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  • RIV/68378271:_____/07:00310274
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  • twin-beam; nonclassical states; quantum correlations; sub-shot noise; conditional states (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [D2DE4889449F]
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  • San Diego
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  • Bellingham
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  • Quantum Communications and Quantum Imaging V
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  • Křepelka, Jaromír
  • Peřina, Jan
  • Allevi, A.
  • Bondani, M.
  • Peřina jr., Jan
  • Andreoni, A.
  • Zambra, G.
  • Paris, M. G. A.
http://linked.open...vavai/riv/typAkce
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number of pages
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  • SPIE
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  • 978-0-8194-6858-1
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