Simple model of Feshbach resonance in the strong-coupling regime
Atomic Physics
2014-11-26 v2 Quantum Gases
Quantum Physics
Abstract
We use the dressed potentials obtained in the adiabatic representation of two coupled channels to calculate s-wave Feshbach resonances in a 3D spherically symmetric potential with an open channel interacting with a closed channel. Analytic expressions for the s-wave scattering length and number of resonances are obtained for a piecewise constant model with a piecewise constant interaction of the open and closed channels near the origin. We show analytically and numerically that, for strong enough coupling strength, Feshbach resonances can exist even when the closed channel does {\em not} have a bound state.
Keywords
Cite
@article{arxiv.1410.0323,
title = {Simple model of Feshbach resonance in the strong-coupling regime},
author = {T. Wasak and M. Krych and Z. Idziaszek and M. Trippenbach and Y. Avishai and Y. B. Band},
journal= {arXiv preprint arXiv:1410.0323},
year = {2014}
}
Comments
9 pages, 8 figures