2003/04/30 by Bogdan Borca, D. Blume, Chris H. Greene · 4 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat
paper · pdf · doi:10.1088/1367-2630/5/1/111
16 pages, 5 figures; Submitted to the New. J. Phys. Focus Issue on Quantum Gases; Revision: changed the formula for the scaled frequency and the numerical results in Sec. 5, Replaced figures 2-5
arxiv created 2003/06/20 · openalex publication_date 2003/09/02 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
A simple two-atom model is shown to describe a Bose–Einstein condensate of alkali atoms subjected to external magnetic field ramps near a Feshbach resonance. The implications uncovered for two atoms in a trap can be applied at least approximately to a many-atom condensate. A connection to observations is accomplished by scaling the trap frequency to achieve a density comparable to that of the experiments, which yields the fraction of atom pairs in the gas that become molecules. A sudden approximation is used to model the external magnetic field ramps in the vicinity of a two-body Feshbach resonance. The results of this model are compared with recent experimental observations of Donley et al (2002 Nature 417 529).