Scaling functions applied to three-body recombination of Cesium-133 atoms

TL;DR

This paper develops universal scaling functions for three-body recombination rates in bosonic atoms, applying them to Cesium-133 and validating against experimental data, thus advancing understanding of Efimov physics.

Contribution

It introduces three new scaling functions derived from Helium-4 data to accurately predict Cesium-133 recombination rates over a wide energy range.

Findings

Scaling functions accurately predict Cesium-133 recombination rates.

Excellent agreement with experimental data from the Innsbruck group.

Validation of universality in three-body recombination processes.

Abstract

We demonstrate the implications of Efimov physics in the recently measured recombination rate of Cesium-133 atoms. By employing previously calculated results for the energy dependence of the recombination rate of Helium-4 atoms, we obtain three independent scaling functions that are capable of describing the recombination rates over a large energy range for identical bosons with large scattering length. We benchmark these and previously obtained scaling functions by successfully comparing their predictions with full atom-dimer phase shift calculations with artificial Helium-4 potentials yielding large scattering lengths. Exploiting universality, we finally use these functions to determine the 3-body recombination rate of Cesium-133 atoms with large positive scattering length, compare our results to experimental data obtained by the Innsbruck group and find excellent agreement.