Energy-dependent 3-body loss in 1D Bose gases

TL;DR

This paper investigates how three-body atom loss in one-dimensional Bose gases depends on energy, confirming theoretical predictions through experiments with quantum Newton's cradles and waveguides.

Contribution

It demonstrates the energy dependence of three-body collision rates in 1D Bose gases and validates the adapted theoretical model with experimental data.

Findings

Three-body collision rate is strongly energy dependent in 1D.

Experimental results agree well with the adapted 1D theory.

Momentum measurements effectively infer collision dynamics.

Abstract

We study the loss of atoms in quantum Newton's cradles (QNCs) with a range of average energies and transverse confinements. We find that the three-body collision rate in one-dimension is strongly energy dependent, as predicted by a strictly 1D theory. We adapt the theory to atoms in waveguides, then using detailed momentum measurements to infer all the collisions that occur, we compare the observed loss to the adapted theory and find that they agree well.