Control of Ultra-cold Inelastic Collisions by Feshbash Resonances and Quasi-One-Dimensional Confinement

Abstract

Cold inelastic collisions of atoms or molecules are analyzed using very general arguments. In free space, the deactivation rate can be enhanced or suppressed together with the scattering length of the corresponding elastic collision via a Feshbach resonance, and by interference of deactivation of the closed and open channels. In reduced dimensional geometries, the deactivation rate decreases with decreasing collision energy and does not increase with resonant elastic scattering length. This has broad implications; e.g., stabilization of molecules in a strongly confining two-dimensional optical lattice, since collisional decay of the highly vibrationally excited states due to inelastic collisions is suppressed. The relation of our results with those based on the Lieb-Liniger model are addressed.

5 pages, 1 figure

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• Observation of Bose-Einstein Condensation of Molecules
• Observation of molecules produced from a Bose-Einstein condensate
• Formation of Quantum-Degenerate Sodium Molecules
• Formation of a molecular Bose-Einstein condensate and an entangled atomic gas by Feshbach resonance
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Cited by in corpus (5)

• Multi-Channel Atomic Scattering and Confinement-Induced Resonances in Waveguides
• Limits to the analogue Hawking temperature in a Bose-Einstein condensate
• Phonon background versus analogue Hawking radiation in Bose-Einstein condensates
• Ramsey interferometry with a two-level Tonks-Girardeau gas
• Effects of nonintegrability on stabilization of Feshbach molecules in atom waveguides