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Stable 85Rb Bose-Einstein Condensates With Widely Tunable Interactions



S L. Cornish, N R. Claussen, J L. Roberts, Eric A. Cornell, C E. Wieman


Bose-Einstein condensation has been achieved in a magnetically trapped sample of 85Rb atoms. Long-lived condensates of up to 104 atoms have been produced by using a magnetic-field-induced Feshbach resonance to reverse the sign of the scattering length. This system provides new opportunities for the study of condensate physics. The variation of the scattering length near the resonance has been used to magnetically tune the condensate self-interaction energy over a wide range, extending from strong repulsive to alrge attractive interactions. When the interactions were switched from repulsive to attractive, the condensate shrank to below our resolution limit, and after difference} 5ms emitted a burst of high-energy atoms.
Physical Review Letters
No. 9


<sup>85</sup> Rb, Bose-Einstein condensation, Feshbach resonance, scattering length


Cornish, S. , Claussen, N. , Roberts, J. , Cornell, E. and Wieman, C. (2000), Stable <sup>85</sup>Rb Bose-Einstein Condensates With Widely Tunable Interactions, Physical Review Letters (Accessed June 22, 2024)


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Created July 31, 2000, Updated October 12, 2021