Ultracold three-body collisions near narrow Feshbach resonances

TL;DR

This paper investigates how the width of narrow Feshbach resonances influences three-body collision behaviors in ultracold gases, revealing universal features and contrasting effects on bosons and fermions.

Contribution

It provides new numerical and analytical insights into the impact of resonance width on three-body collisions near narrow Feshbach resonances.

Findings

Suppression of inelastic processes in bosonic systems with narrow resonances

Enhancement of inelastic processes in fermionic systems with narrow resonances

Identification of universal features related to resonance width

Abstract

We study ultracold three-body collisions of bosons and fermions when the interatomic interaction is tuned near a narrow Feshbach resonance. We show that the width of the resonance has a substantial impact on the collisional properties of ultracold gases in the strongly interacting regime. We obtain numerical and analytical results that allow us to identify universal features related to the resonance width. For narrow resonances, we have found a suppression of all inelastic processes in boson systems leading to deeply bound states and an enhancement for fermion systems.