Three-boson problem near a narrow Feshbach resonance

TL;DR

This paper investigates three-boson systems near narrow Feshbach resonances, revealing that three-body behaviors depend on resonance width and scattering length, leading to novel collision physics with experimental implications.

Contribution

It introduces a theoretical framework for three-boson interactions near narrow Feshbach resonances, highlighting differences from wide resonances and predicting new physical phenomena.

Findings

Three-body recombination rates depend on resonance width and scattering length.

Narrow resonances lead to qualitatively different three-body collision physics.

Implications for Bose-Einstein condensates and atom-molecule experiments.

Abstract

We consider a three-boson system with resonant binary interactions and show that three-body observables depend only on the resonance width and the scattering length. The effect of narrow resonances is qualitatively different from that of wide resonances revealing novel physics of three-body collisions. We calculate the rate of three-body recombination to a weakly bound level and the atom-dimer scattering length and discuss implications for experiments on Bose-Einstein condensates and atom-molecule mixtures near Feshbach resonances.