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<dc:title xml:lang="en">Exotic quantum phenomena in cold atomic gases : numerical approaches</dc:title>
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<dc:subject xml:lang="fr">Systèmes à N corps quantiques</dc:subject>
<dc:subject xml:lang="fr">Physique de la matière condensée Atomes froids</dc:subject>
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<dc:subject xml:lang="fr">Supersolidité</dc:subject>
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<dc:subject xml:lang="en">Supersolids</dc:subject>
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<tef:elementdEntree autoriteExterne="02731569X" autoriteSource="Sudoc">Théorie quantique</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">L'objectif principal de cette thèse est l'étude des propriétés à basse énergie et température de systèmes fortement corrélés de bosons interagissant via des potentiels à portée longue et étendue, et pertinentes pour la réalisation expérimentale avec des gaz atomiques froids. Cette étude est réalisée à l'aide d'une combinaison de techniques numériques, comme le Path Integral Montecarlo et de techniques analytiques. Le principal résultat de mon travail est la démonstration de l’existence d’une phase supersolide à bandes et d’une rare transition entre différents supersolides dans un modèle à interaction finie de bosons de coer dur sur un réseau carré. J'étudie également les scénarios hors d'équilibre de tels modèles via des quenches de température simulées. Enfin, j'étudie comment la restauration de l'extensibilité énergétique dans des systèmes en interaction à longue portée peut avoir une incidence profonde sur les propriétés de basse énergie dans la limite thermodynamique.</dcterms:abstract>
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