Magnetic Feshbach resonances in $^{7}\text{Li}-^{133}\text{Cs}$ mixtures

TL;DR

This paper predicts magnetic Feshbach resonances in ultracold $^{7}$Li-$^{133}$Cs mixtures, enabling control of interactions for studying Efimov and Bose polaron phenomena in systems with large mass imbalance.

Contribution

It extends existing models to predict Feshbach resonances specifically for $^{7}$Li-$^{133}$Cs mixtures, facilitating experimental exploration of complex quantum phenomena.

Findings

Resonances predicted at around 1 gauss magnetic field.

A few resonances suitable for tuning scattering length.

Potential for observing Efimov and Bose polaron physics.

Abstract

Motivated by the prospect of observing Efimov and Bose polaron physics in ultracold mixtures of bosonic atoms with large mass imbalance, this work investigates the magnetic Feshbach resonances between $^{7}\text{Li}$ and $^{133}\text{Cs}$. The resonances are predicted at the 1 gauss level using the model of Pires et al. [Phys. Rev. A, 90, 012710] obtained from experimental observations of resonances between $^{6}\text{Li}$ and $^{133}\text{Cs}$. It is found that a few resonances in a practical range of magnetic field intensity could be used to tune the scattering length between $^{7}\text{Li}$ and $^{133}\text{Cs}$ atoms. Opportunities for observing Efimov and Bose polaron physics are discussed.