Feshbach resonances of harmonically trapped atoms
Quantum Gases
2011-03-09 v2 Quantum Physics
Abstract
Employing a short-range two-channel description we derive an analytic model of atoms in isotropic and anisotropic harmonic traps at a Feshbach resonance. On this basis we obtain a new parameterization of the energy-dependent scattering length which differs from the one previously employed. We validate the model by comparison to full numerical calculations for Li-Rb and explain quantitatively the experimental observation of a resonance shift and trap-induced molecules in exited bands. Finally, we analyze the bound state admixture and Landau-Zener transition probabilities.
Keywords
Cite
@article{arxiv.1005.5306,
title = {Feshbach resonances of harmonically trapped atoms},
author = {Philipp-Immanuel Schneider and Yulian V. Vanne and Alejandro Saenz},
journal= {arXiv preprint arXiv:1005.5306},
year = {2011}
}
Comments
4 pages, 2 figures; revised version with extension to anisotropic traps and new paragraph on trap-induced molecules in excited bands