(^{171}\)Yb\(^+\) optical clock with \(2.2\times 10^{-18}\) systematic uncertainty and absolute frequency measurements

A full evaluation of the uncertainty budget for the ytterbium ion optical clock at the National Physical Laboratory (NPL) was performed on the electric octupole (E3) \(^2\mathrm{S}_{1/2}\,\rightarrow\, ^2\mathrm{F}_{7/2}\) transition. The total systematic frequency shift was measured with a fraction...

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Bibliographic Details
Published inarXiv.org
Main Authors Tofful, Alexandra, Baynham, Charles F A, Curtis, E Anne, Parsons, Adam O, Robertson, Billy I, Schioppo, Marco, Tunesi, Jacob, Margolis, Helen S, Hendricks, Richard J, Whale, Josh, Thompson, Richard C, Godun, Rachel M
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.03.2024
Subjects
Cesium
Frequency measurement
Frequency shift
Uncertainty
Ytterbium
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Summary:A full evaluation of the uncertainty budget for the ytterbium ion optical clock at the National Physical Laboratory (NPL) was performed on the electric octupole (E3) \(^2\mathrm{S}_{1/2}\,\rightarrow\, ^2\mathrm{F}_{7/2}\) transition. The total systematic frequency shift was measured with a fractional standard systematic uncertainty of \(2.2\times 10^{-18}\). Furthermore, the absolute frequency of the E3 transition of the \(^{171}\)Yb\(^+\) ion was measured between 2019 and 2023 via a link to International Atomic Time (TAI) and against the local caesium fountain NPL-CsF2. The absolute frequencies were measured with fractional standard uncertainties between \(3.7 \times 10^{-16}\) and \(1.1 \times 10^{-15}\), and all were in agreement with the 2021 BIPM recommended frequency.
ISSN:2331-8422