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Images jumelles quantiques : paradoxe de Einstein-Podolsky-Rosen dans des paires uniques d'images, et imagerie fantôme temporelle quantique

Abstract : We present in this thesis two experimental works based on the formation of twin images by twin photons : evidence of Einstein-Podolsky-Rosen (EPR) paradox on single pairs of twin images, and the demonstration of quantum temporal ghost imaging.Entangled photons generated by spontaneous parametric down conversion are used to generate images with a similar distribution of photons in the image plane, or symmetrical in the Fourier plane: the twin images. In a first chapter, we propose a description of the twin images, based on the study of the properties of twin beams, and their acquisition by EMCCD cameras in the photon counting regime.In the second chapter we provide a test of the EPR paradox in single pairs of twin images, without any temporal averaging or properties issued of a set of several images. We show that the intercorrelations of only two pairs of twin images, the first one acquired in the image plane and the other one in the Fourier plane, are sufficient to obtain a high degree of paradox.In the last chapter, we show an experiment of quantum temporal ghost imaging. In this experiment, twin images are used to spatially multiplex a nonreproducible time signal. Although it is acquired without temporal resolution, the photons correlations allow its retrieval.
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Séverine Denis. Images jumelles quantiques : paradoxe de Einstein-Podolsky-Rosen dans des paires uniques d'images, et imagerie fantôme temporelle quantique. Optique [physics.optics]. Université Bourgogne Franche-Comté, 2017. Français. ⟨NNT : 2017UBFCD044⟩. ⟨tel-02072305⟩

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