Observation of magnetic Feshbach resonances between Cs and ${}^{173}$Yb

TL;DR

This paper reports the first experimental observation of magnetic Feshbach resonances between cesium and ytterbium-173 atoms, providing insights into atom interactions relevant for quantum control and molecule formation.

Contribution

First observation of magnetic Feshbach resonances between ${}^{173}$Yb and Cs, with experimental results matching theoretical coupled-channel calculations.

Findings

Resonances observed around 622 G and 702 G

Resonance splittings depend on Yb nuclear spin components

Good agreement with theoretical predictions

Abstract

We report the first observation of magnetic Feshbach resonances between ${}^{173}$Yb and $^{133}$Cs. In a mixture of Cs atoms prepared in the $(f=3, m_f=3)$ state and unpolarized fermionic ${}^{173}$Yb we observe resonant atom loss due to two sets of magnetic Feshbach resonances around 622~G and 702~G. Resonances for individual Yb nuclear spin components $m_{i,\mathrm{Yb}}$ are split by its interaction with the Cs electronic spin, which also provides the main coupling mechanism for the observed resonances. The observed splittings and relative resonance strengths are in good agreement with theoretical predictions from coupled-channel calculations.