Accuracy (inaccuracy) budget for a ThF4-based solid-state nuclear clock

Develop a complete inaccuracy budget for a thorium tetrafluoride (ThF4) thin-film nuclear optical clock by identifying and quantifying systematic frequency shifts of the 229mTh transition, including strain and temperature sensitivities of the thorium sites within the ThF4 host material.

Background

The paper estimates the short-term stability for a ThF4 thin-film nuclear clock and analyzes Zeeman-limited linewidths but notes that systematic accuracy (inaccuracy) assessments are not yet available.

The authors expect strain and temperature sensitivity to be important systematics, implying further investigation is required before a full accuracy budget can be established.