The three-body recombination of a condensed Bose gas near a Feshbach resonance

TL;DR

This paper investigates the three-body recombination rate in a homogeneous dilute Bose gas near a Feshbach resonance at zero temperature, providing theoretical insights that align well with experimental data.

Contribution

It offers a theoretical calculation of the three-body recombination rate in a Bose gas near a Feshbach resonance, including ground state and excitations analysis.

Findings

Recombination rate matches experimental data for $^{23}$Na.

Recombination involves atom pair break-up and molecule formation.

Ground state and excitations are characterized at zero temperature.

Abstract

In this paper, we study the three-body recombination rate of a homogeneous dilute Bose gas with a Feshbach resonance at zero temperature. The ground state and excitations of this system are obtained. The three-body recombination in the ground state is due to the break-up of an atom pair in the quantum depletion and the formation of a molecule by an atom from the broken pair and an atom from the condensate. The rate of this process is in good agreement with the experiment on $^{23}$Na in a wide range of magnetic fields.