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Claude Cohen Tannoudji

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

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Accueil du site > Séminaires > LKB > Non-equilibrium and non-harmonic atomic BECs

Non-equilibrium and non-harmonic atomic BECs

Exposé de Zoran Hadzibabic (Univ. of Cambridge, UK)

Vendredi 15 février 2013, 9h15, salle de réunion du siège de l’IFRAF, au 4e étage du bâtiment Rataud à l’ENS au 45 rue d’Ulm, 75005 Paris

A B S T R A C T

I will give an overview of our recent experiments on atomic Bose gases with tunable interactions and in various geometries. By tuning the strength of interactions in a harmonically trapped sample we have created a superheated Bose-condensed gas, in which a BEC survives above the equilibrium critical temperature for up to a minute. We have experimentally reconstructed a non-equilibrium phase diagram of this system and theoretically reproduced our observations [1]. In an optical ring trap, we have observed quantised supercurrents lasting for over two minutes, and have extended the studies of persistent currents to spinor condensates [2]. Most recently, we have also observed Bose-Einstein condensation of atoms in a (quasi-)uniform potential, opening many new possibilities for fundamental many-body studies [3].

[1] A. L. Gaunt et al., arXiv1212.5833
[2] S. Beattie at al., PRL 110, 025301 (2013)
[3] A. L. Gaunt et al., arXiv:1212.4453


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