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arXiv · 2407.04139

Synchronous Comparison of Two Thulium Optical Clocks

A. Golovizin·D. Mishin·D. Provorchenko·D. Tregubov·N. Kolachevsky
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Abstract

The experimental comparison of two thulium optical lattice clocks in a time interval of up to one hour has been carried out. The synchronous comparison of a clock transition in two independent atomic ensembles using a single ultrastable laser has allowed us to eliminate fluctuations of the laser frequency from the measured frequency difference and to reach a relative measurement error of $10^{-16}$ after 500-s averaging, which corresponds to a relative instability of $2\times10^{-15}/\sqrt{\tau}$. The successful demonstration of the long-term operation of two systems using the synchronous comparison of clock transitions opens the possibility of studying systematic shifts in thulium optical clocks with an uncertainty of $10^{-17}$.

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A. Golovizin, D. Mishin, D. Provorchenko, D. Tregubov, N. Kolachevsky. 2024-07-04. Synchronous Comparison of Two Thulium Optical Clocks. https://doi.org/10.1134/s0021364024600873

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