Observation of an orbital interaction-induced Feshbach resonance in 173-Yb

TL;DR

This paper reports the experimental discovery of a new inter-orbital Feshbach resonance in ultracold 173-Yb atoms, enabling tunable interactions between specific atomic states at accessible magnetic fields.

Contribution

The study presents the first observation of an orbital interaction-induced Feshbach resonance in 173-Yb, expanding control over atomic interactions in ultracold gases.

Findings

Resonance observed at accessible magnetic fields.

Universal occurrence for all hyperfine states.

Characterized via cross-thermalization and high-resolution spectroscopy.

Abstract

We report on the experimental observation of a novel inter-orbital Feshbach resonance in ultracold 173-Yb atoms, which opens the possibility of tuning the interactions between the 1S0 and 3P0 metastable state, both possessing vanishing total electronic angular momentum. The resonance is observed at experimentally accessible magnetic field strengths and occurs universally for all hyperfine state combinations. We characterize the resonance in the bulk via inter-orbital cross-thermalization as well as in a three-dimensional lattice using high-resolution clock-line spectroscopy.