An Optical Atomic Clock Based on a Highly Charged Ion

Abstract

Optical atomic clocks are the most accurate measurement devices ever constructed and have found many applications in fundamental science and technology. The use of highly charged ions (HCI) as a new class of references for highest accuracy clocks and precision tests of fundamental physics has long been motivated by their extreme atomic properties and reduced sensitivity to perturbations from external electric and magnetic fields compared to singly charged ions or neutral atoms. Here we present the first realisation of this new class of clocks, based on an optical magnetic-dipole transition in Ar${}^{13+}$. Its comprehensively evaluated systematic frequency uncertainty of $2.2\times 10^{-17}$ is comparable to that of many optical clocks in operation. From clock comparisons we improve by eight and nine orders of magnitude upon the uncertainties for the absolute transition frequency and isotope shift (${}^{40}$Ar vs. ${}^{36}$Ar), respectively. These measurements allow us to probe the largely unexplored quantum electrodynamic nuclear recoil, presented as part of improved calculations of the isotope shift which reduce the uncertainty of previous theory by a factor of three. This work establishes forbidden optical transitions in HCI as references for cutting-edge optical clocks and future high-sensitivity searches for physics beyond the standard model.

Main: 21 pages, 3 figures. Supplement: 20 pages, 2 figures. Accepted version

References in corpus (15)

• An ${}^{27}$Al${}^{+}$ quantum-logic clock with systematic uncertainty below $10^{-18}$
• Enhanced laboratory sensitivity to variation of the fine-structure constant using highly-charged ions
• Trapping of Neutral Mercury Atoms and Prospects for Optical Lattice Clocks
• Coherent laser spectroscopy of highly charged ions using quantum logic
• The Heidelberg compact electron beam ion traps
• Optical transitions in highly-charged californium ions with high sensitivity to variation of the fine-structure constant
• Magnetic-dipole transitions in highly-charged ions as a basis of ultra-precise optical clocks
• Study of highly-charged Ag-like and In-like ions for the development of atomic clocks and search for $\alpha$-variation
• $g$-factor of Boronlike Argon ${}^{40}{\text{Ar}}^{13+}$
• Detection of the $5p-4f$ orbital crossing and its optical clock transition in Pr${}^{9+}$
• Isotope Shifts in Beryllium-, Boron-, Carbon-, and Nitrogen-like Ions from Relativistic Configuration Interaction Calculations
• Optical clocks based on the Cf${}^{15+}$ and Cf${}^{17+}$ ions
• Non-linear isotope-shift effects in Be-like, B-like, and C-like argon
• Highly charged ions for atomic clocks and search for variation of the fine structure constant
• Ground-state $g$ factor of middle-$Z$ boronlike ions

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