Relaxation of the molecular state in atomic Fermi gases near a Feshbach resonance

TL;DR

This paper investigates how molecular relaxation occurs in ultra-cold atomic Fermi gases near a Feshbach resonance, revealing that the relaxation rate is linked to the chemical potential and affects the excitation spectrum.

Contribution

It provides a theoretical analysis of molecular relaxation rates and their relation to the chemical potential in Fermi gases near Feshbach resonances.

Findings

Relaxation rate is proportional to the chemical potential.

Lower excitation spectrum is not well-defined near resonance.

Molecular relaxation influences the system's excitation properties.

Abstract

The relaxation processes in an ultra-cold degenerate atomic Fermi gas near a Feshbach resonance are considered. It is shown that the relaxation rate of the molecules being in a resonance with the atomic Fermi system is of the order of the part of the chemical potential determined by the interaction between resonance molecules. In this connection the lower part of the excitation spectrum in the system of resonance molecules is not well-defined.