K-39 Bose-Einstein condensate with tunable interactions

Year: 2007

Authors: Roati G., Zaccanti M., D’Errico C., Catani J., Modugno M., Simoni A., Inguscio M., Modugno G.

Autors Affiliation: LENS, Dipartimento di Fisica, CNR-INFM, 50019 Sesto Fiorentino, Italy; LENS, Dipartimento di Matematica Applicata, Università di Trento, I-38050 Povo, Italy; Laboratoire de Physique des Atomes, Lasers, Molécules et Surfaces, Unités Mixtes de Recherche 6627 du CNRS, Université de Rennes, 35042 Rennes Cedex, France

Abstract: We produce a Bose-Einstein condensate of K-39 atoms. Condensation of this species with a naturally small and negative scattering length is achieved by a combination of sympathetic cooling with Rb-87 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 K-39 condensate is interesting for future experiments requiring a weakly-interacting Bose gas.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 99 (1)      Pages from: 010403-1  to: 010407-4

KeyWords: Cooling; Gas condensates; Scattering, Bose gas; Magnetic tuning, Bose-Einstein condensation; Collapse; Soliton; Cesium
DOI: 10.1103/PhysRevLett.99.010403

Citations: 175
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