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<dc:title xml:lang="en">Optimizing gate pulses and circuits of Rydberg quantum computers with artificial evolution</dc:title>
<dcterms:alternative xml:lang="fr">Optimisation des portes et circuits logiques sur les ordinateurs quantiques à base d’atomes de Rydberg par évolution artificielle</dcterms:alternative>
<dc:subject xml:lang="fr">Quantique</dc:subject>
<dc:subject xml:lang="fr">Bit</dc:subject>
<dc:subject xml:lang="fr">Porte</dc:subject>
<dc:subject xml:lang="fr">Logique</dc:subject>
<dc:subject xml:lang="fr">Atome</dc:subject>
<dc:subject xml:lang="fr">Rydberg</dc:subject>
<dc:subject xml:lang="fr">Optique</dc:subject>
<dc:subject xml:lang="fr">Contrôle</dc:subject>
<dc:subject xml:lang="fr">Pareto</dc:subject>
<dc:subject xml:lang="fr">Optimisation</dc:subject>
<dc:subject xml:lang="fr">Évolution</dc:subject>
<dc:subject xml:lang="fr">Artificielle</dc:subject>
<dc:subject xml:lang="fr">Simulation</dc:subject>
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<dc:subject xml:lang="fr">Bruit</dc:subject>
<dc:subject xml:lang="fr">Erreur</dc:subject>
<dc:subject xml:lang="en">Quantum</dc:subject>
<dc:subject xml:lang="en">Bit</dc:subject>
<dc:subject xml:lang="en">Gate</dc:subject>
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<dc:subject xml:lang="en">Rydberg</dc:subject>
<dc:subject xml:lang="en">Optical</dc:subject>
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<dc:subject xml:lang="en">Optimisation</dc:subject>
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<dcterms:abstract xml:lang="fr">Cette thèse explore la synthèse de portes quantiques par évolution artificielle (EA), une classe d’heuristiques d’optimisation. Elle est motivée par la sensibilité au bruit du matériel quantique, ici des atomes neutres en interaction de Rydberg optiquement piégés, requérant de moduler le contrôle en conséquence. Ayant introduit l’EA, en particulier CMA-ES et NSGA-III, nous les appliquons à Pareto-minimiser l’infidélité et la dégradation de portes sujettes à un bruit de contrôle stochastique (BCS), y obtenant de raisonnables taux d’erreur. Des atomes restant en état de Rydberg après une porte bruitée, ils sont désexcités dans un état binaire ou un mélange statistique de ceux-ci. Nous calculons les canaux d’erreurs de ces projections, les incluons dans la simulation de modèle d’Ising transverse, comparons l’évolution de la fidélité de circuit et de l’intrication d’opérateur dans chaque cas, concluons que la projection optimale dépend du circuit. La structure du contrôle de porte quantique est conservée sous BCS, nous formulons deux algorithmes en atteignant l’optimum global, tirés des fonctions de valeur et de complexité polynomiale en le nombre d’atomes.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This thesis explores the synthesis of quantum logic gates by artificial evolution (AE), a class of heuristic biology-inspired optimisation algorithms. It is motivated by the noise sensitivity of quantum hardware, Rydberg-interacting neutral atoms in optical lattices here, needing to modulate control pulses into robust gates. After introducing AE, focusing on CMA-ES and NSGA-III, we apply them to Pareto-minimise the infidelity and decay risk of pulses subject to stochastic control noise (SCN), getting reasonable error rates in this context. As noise leaves atoms in Rydberg states after the gate, they are de-excited to a qubit state or a statistical mixture thereof. We then derive the error channels of these projections, plug them in the emulation of a transverse-field Ising model, compare the evolution of circuit fidelity and operator entanglement in each scenario, and conclude that the best projection is a circuit-dependent question. As that derivation proves that the structure of gate control problems is conserved under SCN, we formulate two globally-optimal algorithms solving them, based on value functions and scaling favorably in the numer of atoms.</dcterms:abstract>
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