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Many-body aspects of coherent atom-molecule oscillations

R. A. Duine·H. T. C. Stoof
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Abstract

We study the many-body effects on coherent atom-molecule oscillations by means of an effective quantum field theory that describes Feshbach-resonant interactions in Bose gases in terms of an atom-molecule hamiltonian. We determine numerically the many-body corrections to the oscillation frequency for various densities of the atomic condensate. We also derive an analytic expression that approximately describes both the density and magnetic-field dependence of this frequency near the resonance. We find excellent agreement with experiment.

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R. A. Duine, H. T. C. Stoof. 2003-02-18. Many-body aspects of coherent atom-molecule oscillations. https://doi.org/10.1103/physrevlett.91.150405

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