Multichannel Scattering and Loss Processes of Ultracold Atoms in Anisotropic Harmonic Waveguides

TL;DR

This paper introduces a general grid method to analyze multi-channel scattering of ultracold bosonic atoms in anisotropic harmonic waveguides, revealing how anisotropy influences confinement resonances and reactive collision rates.

Contribution

The study develops a comprehensive numerical approach for multi-channel scattering in anisotropic traps, providing new insights into resonance behavior and reactive rates in ultracold atom systems.

Findings

Anisotropy significantly enhances reactive rate constants.

Range and form of interatomic potential affect confinement resonances.

The method accurately models elastic and inelastic scattering processes.

Abstract

We have developed the general grid method for multi-channel scattering of bosonic atoms inside a harmonic waveguide with transverse anisotropy. This approach is employed to analyze elastic as well as inelastic multi-channel confined scattering. For the elastic scattering, the effects of the range and form of interatomic potential and the waveguide anisotropy on the confinement induced resonance are studied. We have also investigated quantitatively the reactive rate constant in confined atom-atom collisions. It is found that a slight anisotropy to the confining trap considerably enhances the reactive rate constant in multi-channel regime.