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Mémoire quantique de haute efficacité pour la mise en oeuvre de protocoles d'information quantique

Benjamin Pointard 1
1 Laboratoire Charles Fabry / Optique Quantique
LCF - Laboratoire Charles Fabry
Abstract : The aim of this thesis work is to implement a high efficiency quantum memory as part of a generation protocol for quantum states of light, targeting an increase of the generation rate by several orders of magnitude. We show how such an architecture can be used in practice for the generation of key states for quantum optics, as the "optical Schrödinger cat states" (quantum superposition of coherent states with opposite phases) which are an elementary piece for numerous protocols in the field of quantum information. We implement this memory with a high finesse optical cavity, an active device allowing to store/extract a light pulse on demand, and we feed it with single photons from a high-rate source in a synchronized optical cavity. The use of such memory requires a complete knowledge of the physical parameters, such as the phase of the generated quantum states. This led us to develop accurate diagnostic tools. This constitutes a first step towards the real-time manipulation of states encoded on free-propagating light.
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Submitted on : Friday, August 27, 2021 - 3:20:11 PM
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Benjamin Pointard. Mémoire quantique de haute efficacité pour la mise en oeuvre de protocoles d'information quantique. Optique [physics.optics]. Université Paris-Saclay, 2021. Français. ⟨NNT : 2021UPASP024⟩. ⟨tel-03327793⟩

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