Temperature sensitivity of a Thorium-229 solid-state nuclear clock

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Abstract

Quantum state-resolved spectroscopy of the low energy thorium-229 nuclear transition was recently achieved. The five allowed transitions within the electric quadrupole splitting structure were measured to the kilohertz level in a calcium fluoride host crystal, opening the field of nuclear-based optical clocks. Central to the performance of solid-state clock operation is an understanding of systematic shifts such as the temperature dependence of the clock transitions.

Year of Publication
2025
Date Published
2025-04
Journal Title
Physical Review Letters
Volume
134
Start Page or Article ID
113801
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Gauging the temperature effect on a nuclear clock