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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 > LAC > Exploring Exotic Quantum Matter in Innsbruck : Ultracold Erbium Atoms and Efimov states

Exploring Exotic Quantum Matter in Innsbruck : Ultracold Erbium Atoms and Efimov states

Séminaire de Francesca FERLAINO (Institut für Experimentalphysik, Universität Innsbruck, Austria)

Jeudi 10 juin 2010, 11 h, salle Balmer

In the first part of the talk, I will present the newborn experiment in Innsbruck operating with erbium atoms. Over the last years, the frontiers of ultracold quantum gases have been enlarged to new non- alkali atomic species, opening up intriguing possibilities for a variety of new applications. Erbium is a very interesting species, being an extremely heavy (166 a. u.) and strongly magnetic (7 \mu_B) rare-earth atom with a rich isotopic variety and a complex energy level structure. The unique combination of interesting properties allows studies of dipolar effects where the anisotropic and long-range dipole-dipole interactions dominating over the simple isotropic contact interaction. With erbium Feshbach molecules a more extreme situation can be achieved where the strength of the dipole-dipole interaction even gets close to the one between ground-state polar molecules.

In the second part of the talk, I will present our latest results on Efimov physics, obtained in an experiment operating with cesium atoms and molecules. I will first give an overview of the previous observations in this system for purely atomic samples, atom-dimer mixtures, and pure dimer samples. I will then report on a fundamental step beyond the Efimov scenario by investigating universal four-body processes. Our findings provide a strong evidence for the existence of a pair of four-body states, which is strictly connected to Efimov trimers via universal relations.

C.N.R.S./Laboratoire AIME COTTON,
Bâtiment 505,
Campus d’Orsay 91405 - ORSAY Cedex
Téléphone : - Fax :

Voir en ligne : http://www.lac.u-psud.fr/-Approche-...

Post-scriptum :

Contacts séminaires :

  • Jean-Pierre GALAUP
  • Laurence PRUVOST

Tel : 01 69 35 21 01