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39-K Bose-Einstein condensate with tunable interactions

G. Roati·M. Zaccanti·C. D'Errico·J. Catani·M. Modugno·A. Simoni·M. Inguscio·G. Modugno
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Abstract

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

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G. Roati, M. Zaccanti, C. D'Errico, J. Catani, M. Modugno, A. Simoni, M. Inguscio, G. Modugno. 2007-03-27. 39-K Bose-Einstein condensate with tunable interactions. https://doi.org/10.1103/physrevlett.99.010403

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