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Claude Cohen Tannoudji

Prix Nobel en 1997 pour le ralentissement et le piégeage des atomes par la lumière laser.

Ses travaux sont à la source des recherches actuelles de l'IFRAF.



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Accueil du site > Séminaires > LKB > Quantum atom optics at work - squeezing of atomic matterwaves

Quantum atom optics at work - squeezing of atomic matterwaves

Markus Oberthaler (Heidelberg University)

Lundi 2 avril à 11h30 Salle de Conférence IV Département de Physique de l’ENS
24 rue Lhomond 75005 Paris

Bose Einstein condensates are a promising experimental system for the investigation of quantum optical questions. Due to the strong atom-atom interaction it was already envisioned at the very beginning, that ultracold gases should be ideal for the generation of non-classical matterwave states.

The experimental challenge was to push the detection techniques in order to reveal the entanglement. One crucial aspect is that one has to combine particle detection i.e. density, with coherence measurements. I will discuss this in detail using the example of spin squeezing utilizing internal degrees of freedom and its application to interferometry beyond classical limits.

Furthermore I will describe our recent results on the implementation of atomic homodyne measurements, a technique for accessing coherences, which allow the detection of mode entanglement of matter waves generated by spin changing collisions.


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