Document Type

Article

Publication Date

Fall 11-3-2006

Publication Title

Physical Review Letters

ISSN

0031-9007

Volume

97

Issue

18

First Page

180404-1

Last Page

180404-4

DOI

10.1103/PhysRevLett.97.180404

Abstract

We report on the observation of ultracold heteronuclear Feshbach molecules. Starting with a 87Rb Bose-Einstein condensate and a cold atomic gas of 85Rb, we utilize previously unobserved interspecies Feshbach resonances to create up to 25,000 molecules. Even though the 85Rb gas is nondegenerate, we observe a large molecular conversion efficiency due to the presence of a quantum degenerate 87Rb gas; this represents a key feature of our system. We compare the molecule creation at two different Feshbach resonances with different magnetic-field widths. The two Feshbach resonances are located at 265.44±0.15   G and 372.4±1.3  G. We also directly measure the small binding energy of the molecules through resonant magnetic-field association.

Included in

Physics Commons

Share

COinS