39-K Bose-Einstein condensate with tunable interactions

Details 39-K Bose-Einstein condensate with tunable interactions 39-K Bose-Einstein condensate with tunable interactions

2007-03-27

arxiv.org/abs/cond-mat/0703714v1

Phys. Rev. Lett. 99, 010403 (2007)

Physics

Condensed Matter

Other Condensed Matter

5 pages

Scientific paper

10.1103/PhysRevLett.99.010403

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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