Many-body aspects of coherent atom-molecule oscillations

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.

4 pages, revtex 4, v2: minor changes: corrected some typos/omissions, Discarded use of the term 'Rabi frequency' to avoid confusion

References in corpus (3)

• Very high precision bound state spectroscopy near a ${}^{85}$Rb Feshbach resonance
• Microscopic theory of atom-molecule oscillations in a Bose-Einstein condensate
• Dynamics of a Bose-Einstein Condensate near a Feshbach Resonance

Cited by in corpus (16)

• Production of cold molecules via magnetically tunable Feshbach resonances
• Atom-molecule coherence in Bose gases
• Quantum phase transition in an atomic Bose gas with a Feshbach resonance
• Experimental studies of equilibrium vortex properties in a Bose-condensed gas
• Einstein-Podolsky-Rosen correlations via dissociation of a molecular Bose-Einstein condensate
• Feshbach resonances with large background scattering length: interplay with open-channel resonances
• Bound-state signatures in quenched Bose-Einstein condensates
• Quantum Dynamics and Statistics Properties of Atom-Molecule Bose-Einstein Condensate
• Ramsey interferometry with atoms and molecules: two-body versus many-body phenomena
• Three-dimensional solitons in coupled atomic-molecular Bose-Einstein condensates
• Quadratic-nonlinear Landau-Zener transition for association of an atomic Bose-Einstein condensate with inter-particle elastic interactions included
• Compositeness of hadrons, nuclei, and atomic systems
• Condensate-profile asymmetry of a boson mixture in a disk-shaped harmonic trap
• Observation of the density dependence of the closed-channel fraction of a ${}^6$Li superfluid
• The three-body recombination of a condensed Bose gas near a Feshbach resonance
• Ultra-cold fermions in optical lattices