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     <dc:title xml:lang="fr">Étude théorique des collisions ultra-froides en réseau optique</dc:title>
     <dcterms:alternative xml:lang="en">Theoretical study of ultracold collisions in optical lattice</dcterms:alternative>
     <dc:subject xml:lang="fr">physique quantique</dc:subject><dc:subject xml:lang="fr">atomes ultra-froids</dc:subject><dc:subject xml:lang="fr">théorie des collisions</dc:subject><dc:subject xml:lang="fr">réseaux optiques</dc:subject><dc:subject xml:lang="fr">méthodes numériques  </dc:subject>
     <dc:subject xml:lang="en">quantum physics</dc:subject><dc:subject xml:lang="en">ultra-cold atoms</dc:subject><dc:subject xml:lang="en">collision theory</dc:subject><dc:subject xml:lang="en">optical lattice</dc:subject><dc:subject xml:lang="en">numerical methods</dc:subject>
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     <dcterms:abstract xml:lang="en">An optical lattice, created by lasers, can trap atoms cooled to ultra-low temperatures. It provides a constraint as if it were a perfect crystal (a crystal without thermal agitation). I describe the states of particles in a periodic potential (optical network) using probability waves (quantum physics) stationary (independent theory of time). The wave nature of the material is exacerbated at very low temperatures and gives rise to interference phenomena and individual resonance.</dcterms:abstract>
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