Feshbach resonance in a strictly two-dimensional atomic Bose gas
arXiv:cond-mat/0503700 · doi:10.1016/j.physb.2004.09.001
Abstract
We discuss the atom-atom scattering problem across a Feshbach resonance in a two-dimensional dilute Bose gas at zero temperature, in the limit where the s-wave scattering length exceeds the width of the vertical confinement. We determine a tunable coupling-strength parameter and by controlling it we evaluate how the condensate wave function spreads out with increasing atom-atom repulsions. We also discuss the stability of the condensate in the magnetic-field regime where the coupling has become attractive.
9 pages, 1 figure