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ETUDE THEORIQUE ET EXPERIMENTALE DES CORRELATIONS QUANTIQUES OBTENUES PAR MELANGE A QUATRE ONDES DANS UNE VAPEUR ATOMIQUE

Abstract : We study both theoretically and experimentally the generation of quantum correlations in the continuous variable regime by way of four-wave mixing in a hot atomic vapor. Two theoretical approaches have been developed. On one side, we study the four-wave mixing under the "classical" non-linear optics point of view. In such a way we obtain the evolution equation for an ideal linear amplifier in a chi(3) medium. On the other side, we present a microscopic model with 4 levels in the double-Lambda configuration to calculate the chi(3) coefficient in a atomic vapor dressed with a laser. This calculation allows us to derive the spectra of intensity noise for interesting parameters. The experimental part of this work describes the demonstration of this effect on the D1 line of rubidium 85. We present a measurement of relative intensity squeezing as high as -9.2dB below the standard quantum limit, and an original regime where quantum correlations have been measured without amplification. These results have broad applications in the field of multimode quantum optics, e.g. quantum imaging or the multimode quantum memories.
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https://tel.archives-ouvertes.fr/tel-00558505
Contributor : Quentin Glorieux <>
Submitted on : Friday, January 21, 2011 - 7:50:44 PM
Last modification on : Monday, November 23, 2020 - 10:36:04 PM
Long-term archiving on: : Friday, April 22, 2011 - 3:57:10 AM

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  • HAL Id : tel-00558505, version 1

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Quentin Glorieux. ETUDE THEORIQUE ET EXPERIMENTALE DES CORRELATIONS QUANTIQUES OBTENUES PAR MELANGE A QUATRE ONDES DANS UNE VAPEUR ATOMIQUE. Physique Atomique [physics.atom-ph]. Université Paris-Diderot - Paris VII, 2010. Français. ⟨tel-00558505⟩

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