Many-body aspects of coherent atom-molecule oscillations
R.A. Duine, H.T.C. Stoof
TL;DR
This paper investigates many-body effects on atom-molecule oscillations in Bose gases using an effective quantum field theory, providing numerical and analytical insights that align well with experimental data.
Contribution
It introduces a comprehensive quantum field theoretical model to analyze many-body corrections in atom-molecule oscillations near Feshbach resonances.
Findings
Numerical corrections to oscillation frequency across densities
Analytic expression for frequency dependence on density and magnetic field
Excellent agreement with experimental observations
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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