Resonant Atom-Dimer Relaxation in Ultracold Atoms

TL;DR

This paper investigates resonant atom-dimer relaxation in ultracold atoms, focusing on Efimov resonances and their impact on three-body loss rates, with calculations incorporating temperature effects and effective field theory.

Contribution

It provides improved calculations of atom-dimer relaxation rates as a function of temperature using effective field theory inputs.

Findings

Resonant peaks in atom-dimer relaxation rates at large positive scattering lengths.

Enhanced understanding of temperature dependence in three-body loss processes.

Application of effective field theory to calculate scattering phase shifts.

Abstract

Three-body systems with large scattering length display universal phenomena associated with a discrete scaling symmetry. These phenomena include resonant enhancement of three-body loss rates when an Efimov three-body resonance is at the scattering threshold. In particular, there can be resonant peaks in the atom-dimer relaxation rate for large positive scattering length. We improve upon earlier studies and calculate the atom-dimer relaxation rate as a function of temperature using a Bose-Einstein distribution for the thermal average. As input, we use calculations of the atom-dimer scattering phase shifts from effective field theory.