Tuning the Scattering Length with an Optically Induced Feshbach Resonance
M. TheisInstitut für Experimentalphysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, AustriaGregor ThalhammerInstitut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, AustriaKlaus WinklerInstitut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, AustriaM. HellwigInstitut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, AustriaGeorge A. RuffInstitut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, AustriaRudolf GrimmInstitut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, AustriaJohannes Hecker DenschlagInstitut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
2004en
ABI
Annotatsiya
We demonstrate optical tuning of the scattering length in a Bose-Einstein condensate as predicted by Fedichev et al. [Phys. Rev. Lett. 77, 2913 (1996)]. In our experiment, atoms in a 87Rb condensate are exposed to laser light which is tuned close to the transition frequency to an excited molecular state. By controlling the power and detuning of the laser beam we can change the atomic scattering length over a wide range. In view of laser-driven atomic losses, we use Bragg spectroscopy as a fast method to measure the scattering length of the atoms.
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