Tuning the Scattering Length with an Optically Induced Feshbach Resonance

M. Theis, G. Thalhammer, K. Winkler, M. Hellwig, G. Ruff, R. Grimm, and J. Hecker Denschlag
Phys. Rev. Lett. 93, 123001 – Published 15 September 2004

Abstract

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 R87b 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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  • Received 21 April 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.123001

©2004 American Physical Society

Authors & Affiliations

M. Theis1, G. Thalhammer1, K. Winkler1, M. Hellwig1, G. Ruff1,*, R. Grimm1,2, and J. Hecker Denschlag1

  • 1Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria
  • 2Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria

  • *Permanent address: Department of Physics, Bates College, Lewiston, ME 04240.

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Vol. 93, Iss. 12 — 17 September 2004

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