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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 > Archives > Robin Côté (Univ. of Connecticut) à l’IFRAF

Robin Côté (Univ. of Connecticut) à l’IFRAF

A l’occasion de son passage à Paris, Robin Côté donnera un exposé informel à l’IFRAF : jeudi 21 juillet 2011, à 11h30 dans la salle de réunion du siège de l’IFRAF, au 4e étage du batiment Rataud, à l’ENS au 45 rue d’Ulm 75005 Paris

Meta-stable 1-D gases of polar molecules with attractive dipole forces

A B S T R A C T

The recent achievements in the formation and manipulation of ultracold polar molecules have opened the gate to exciting new studies in several fields of physical sciences.

Polar molecules could find uses in quantum information science and in precision measurements, while dense samples could provide a fertile ground for novel quantum gases because of their long-range and anisotropic interactions. Until now, stable dipolar gases were thought to require a repulsive dipole-dipole interaction, such as provided by parallel dipoles aligned perpendicularly to a two-dimensional (2-D) trap. However, to observe interesting new correlations and condensed matter phases, attractive interactions are needed.

Here, we explore how meta-stable one-dimensional (1-D) samples of ultracold polar molecules could be created with attractive long-range dipole-dipole interaction. We show that a repulsive barrier due to a strong quadrupole interaction can stabilize a gas of ultracold KRb molecules and even lead to long-range wells supporting bound states. The properties of these wells can be controlled by external electric fields, allowing the formation of long chains of KRb polymers, and the further study of Luttinger liquid transition.

We also discuss the general molecular properties necessary for the existence of a repulsive barrier.

Robin Côté (Univ. of Connecticut)

Voir en ligne : http://www.phys.uconn.edu/~rcote/