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Conception et réalisation d'un gradiomètre de gravité à atomes froids

Abstract : This thesis is about the design and realisation of a new atomic interferometer experiment at SYRTE. It will allow ultra-sensitive measurements of the vertical gradient of gravity. This experiment will work using ultra-cold atoms as a source, prepared on an atom chip. It will use large momentum transfer beam-splitter, obtained by high order Bragg diffraction. The transport of atoms will be provided by moving optical lattices. A first part of the experimental setup was assembled and its operation was validated by producing a dual interferometer. This interferometer is performed on two atomic clouds produced successively from the same source of cold atoms, and interrogated by the same pair of Raman beams. A new method of differential phase extraction has been experimentally demonstrated. It is based on the exploitation of the correlations between the interferometer phase measurements and the estimation of the seismic phase provided by an additional classical sensor.
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Submitted on : Wednesday, September 5, 2018 - 3:18:11 PM
Last modification on : Wednesday, November 17, 2021 - 12:30:35 PM
Long-term archiving on: : Thursday, December 6, 2018 - 4:52:42 PM


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  • HAL Id : tel-01868516, version 1


Mehdi Langlois. Conception et réalisation d'un gradiomètre de gravité à atomes froids. Physique Quantique [quant-ph]. Université Pierre et Marie Curie - Paris VI, 2017. Français. ⟨NNT : 2017PA066513⟩. ⟨tel-01868516⟩



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