Scattering properties of weakly bound dimers of fermionic atoms

TL;DR

This paper develops a theoretical framework to analyze scattering and relaxation processes of weakly bound fermionic atom dimers near Feshbach resonances, aiding in the manipulation of such molecules.

Contribution

It introduces a single-channel zero range approximation method for calculating atom-dimer and dimer-dimer scattering and relaxation in fermionic gases.

Findings

Applicable near wide Feshbach resonances

Provides insights into elastic and inelastic collision processes

Facilitates manipulation of fermionic dimers

Abstract

We consider weakly bound diatomic molecules (dimers) formed in a two-component atomic Fermi gas with a large positive scattering length for the interspecies interaction. We develop a theoretical approach for calculating atom-dimer and dimer-dimer elastic scattering and for analyzing the inelastic collisional relaxation of the molecules into deep bound states. This approach is based on the single-channel zero range approximation, and we find that it is applicable in the vicinity of a wide two-body Feshbach resonance. Our results draw prospects for various interesting manipulations of weakly bound dimers of fermionic atoms.