Many-body aspects of coherent atom-molecule oscillations

H.T.C. Stoof; R.A. Duine

Many-body aspects of coherent atom-molecule oscillations

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arxiv cond-mat/0302304 v2 pith:AIA4KONC submitted 2003-02-14 cond-mat.stat-mech

Many-body aspects of coherent atom-molecule oscillations

R.A. Duine , H.T.C. Stoof This is my paper

classification cond-mat.stat-mech

keywords atom-moleculemany-bodycoherentdescribesfrequencyoscillationsagreementanalytic

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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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