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Spectroscopie par corrélations d'intensité d'atomes refroidis par laser: Dynamique et transport dans les réseaux atomiques

Christophe Jurczak 1
1 laboratoire Charles Fabry de l'Institut d'Optique / Optique atomique
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
Abstract : This thesis is concerned with experiments and theory on photon correlations in the light scattered from laser cooled atoms. Depending on the atomic sample, the intensity correlation spectrum (or in the time domain, the correlation function) gives different kinds of information. We show that, for a disordered. atomic gas, it allows one to measure the kinetic temperature of the sample. But the technique is much more interesting for the study-of atomic motion in a 3D periodic optical potential (an optical lattice). The intensity correlation functions and spectra are interpreted with help from a detailed numerical study and give access to the small as well as large scale transport properties of the aoms in the lattice. In one series of experimentswe show that intensity correlation spectroscopy is comparable with other technjques as concems the study of the local dyamics and of the vibrational motion; We modified the technique to take into account the nature of the polarization of the light scattered from the lattice and we show that polarization selective intensity correlation spectroscopy gives truly original results. Cross­ correlations between different polarization components of the scattered light allow us to show that the motion is diffusive along certain directions and bear the signature of a novel antibunching effect.
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https://pastel.archives-ouvertes.fr/tel-00370772
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Submitted on : Wednesday, March 25, 2009 - 12:07:19 PM
Last modification on : Wednesday, October 14, 2020 - 3:59:10 AM
Long-term archiving on: : Saturday, November 26, 2016 - 6:48:19 AM

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  • HAL Id : tel-00370772, version 1

Citation

Christophe Jurczak. Spectroscopie par corrélations d'intensité d'atomes refroidis par laser: Dynamique et transport dans les réseaux atomiques. Physique Atomique [physics.atom-ph]. Ecole Polytechnique X, 1996. Français. ⟨tel-00370772⟩

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