. Je-remercie-sa-directrice-michèle and . Leduc-de, avoir fait bénéficier de conditions de recherche exceptionnelles J'ai travaillé dans le groupe ? atomes froids ? dirigé par Claude Cohen-Tannoudji. Je tiensàtiens`tiensà le remercier pour l'intérêt qu'il a toujours portéporté`portéà mes recherches et pour la clarté de ses explications lors de chacune de nos réunions

I. Bouchoule, A. Kuhn-ont-de-plus-relu-attentivement-le-manuscrit, M. Arndt, M. B. Dahan, D. Boiron et al., Makoto Morinaga, Maxime Ol'shanii, Francesco Pavone Enfin, je tiensàtiens`tiensà remercier le groupe d'optique non linéaire avec lequel j'ai eu des contacts fréquents et toujours fructueux, Je remercié egalement tous les membres du groupe pour leur aide sous forme de prêt de matériel Ce travail n'aurait pû etre réalisé sans le soutien des services techniques du laboratoire et du département. Je tiensàtiens`tiensà remercier en particulier André Clouqueur et Lionel Perennes Je remercié egalement l'´ equipe du secrétariat, en particulierGenevì eve Piard et Michèle Sanchez

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