Scattering in Mixed Dimensions with Ultracold Gases

TL;DR

This study experimentally explores how ultracold atomic gases confined in different dimensions interact, revealing resonances in mixed-dimensional scattering through magnetic tuning near Feshbach resonances.

Contribution

It demonstrates the first experimental observation of mix-dimensional scattering resonances in ultracold gases using species-selective confinement and magnetic field tuning.

Findings

Observation of multiple scattering resonances in mixed dimensions

Good agreement between experimental results and theoretical predictions

Controlled tuning of interactions via magnetic fields near Feshbach resonances

Abstract

We experimentally investigate the mix-dimensional scattering occurring when the collisional partners live in different dimensions. We employ a binary mixture of ultracold atoms and exploit a species-selective 1D optical lattice to confine only one atomic species in 2D. By applying an external magnetic field in proximity of a Feshbach resonance, we adjust the free-space scattering length to observe a series of resonances in mixed dimensions. By monitoring 3-body inelastic losses, we measure the magnetic field values corresponding to the mix-dimensional scattering resonances and find a good agreement with the theoretical predictions based on simple energy considerations.