Production of strongly bound 39K bright solitons

TL;DR

This paper reports the creation of strongly bound 39K bright solitons, demonstrating their properties and potential applications in physics and interferometry by analyzing their volume and density near collapse conditions.

Contribution

It presents the first production and detailed characterization of 39K bright solitons with high densities close to collapse, expanding the understanding of matter-wave solitons.

Findings

Achieved peak densities of ~5 x 10^{20} m^{-3}

Studied soliton volume dependence on scattering length

Demonstrated solitons near collapse threshold

Abstract

We report on the production of 39 K matter-wave bright solitons, i.e., 1D matter-waves that propagate without dispersion thanks to attractive interactions. The volume of the soliton is studied as a function of the scattering length through three-body losses, revealing peak densities as high as $\sim 5 \times 10^{20} m^{-3}$. Our solitons, close to the collapse threshold, are strongly bound and will find applications in fundamental physics and atom interferometry.