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Many-Body Aspects of Coherent Atom-Molecule Oscillations

By R.A. Duine and H.T.C. Stoof


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

Topics: Natuur- en Sterrenkunde
Year: 2003
OAI identifier: oai:dspace.library.uu.nl:1874/13758
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