Tuning the Scattering Length with an Optically Induced Feshbach Resonance

2004/04/30 by M. Theis, Gregor Thalhammer, G. Thalhammer +9 · 26 citations
Chemistry · Physics and Astronomy · #Advanced Frequency and Time Standards #Cold Atom Physics and Bose-Einstein Condensates #Spectroscopy and Laser Applications #cond-mat.other #cond-mat.soft

paper · pdf · doi:10.1103/physrevlett.93.123001

published as Phys. Rev. Lett. 93, 123001 (2004) · submitted to PRL, 5 pages, 5 figures

openalex publication_date 2004/09/15 · arxiv created 2004/09/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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 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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