Confinement-Induced Resonances in Rabi-Coupled Bosonic Mixtures

TL;DR

This paper investigates how confinement-induced resonances in Rabi-coupled bosonic mixtures can be shifted and controlled through external confinement and Rabi coupling, enhancing tunability of interactions in ultracold gases.

Contribution

It provides an exact solution to the two-body scattering problem showing how Rabi coupling and confinement influence resonance positions, offering new control mechanisms.

Findings

Resonance positions can be shifted to smaller scattering lengths with large Rabi coupling.

Confinement-induced resonances become more tunable and accessible.

The results enable better control of interactions in ultracold quantum gases.

Abstract

We consider coherently-coupled bosonic mixtures scattering at low energies in the presence of an external confinement along either one or two directions. We exactly solve the two-body scattering problem, showing that for large Rabi coupling the confinement-induced resonance can be displaced towards scattering lengths values much smaller than the oscillator length. Our results make the observation of confinement-induced resonances more tunable and accessible, offering yet another handle for the efficient control of strong interactions in ultracold quantum gases.