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* Corresponding author 1 European Laboratory for Non-linear Spectroscopy LENS 2 PALMS - Physique des atomes, lasers, molécules et surfaces

Abstract : We produce a Bose-Einstein condensate of 39K atoms. Condensation of this species with a naturally small and negative scattering length is achieved by a combination of sympathetic cooling with 87Rb and direct evaporation, exploiting the magnetic tuning of both inter- and intraspecies interactions at Feshbach resonances. We explore the tunability of the self-interactions by studying the expansion and the stability of the condensate. We find that a 39K condensate is interesting for future experiments requiring a weakly-interacting Bose gas.

Autor: G. Roati - M. Zaccanti - C. D-Errico - Jacopo Catani - Michele Modugno - Andrea Simoni - M. Inguscio - Massimo Inguscio -

Fuente: https://hal.archives-ouvertes.fr/


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