Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 50: Precision spectroscopy of atoms and ions III (joint session A/Q)
Q 50.1: Invited Talk
Thursday, March 17, 2022, 10:30–11:00, A-H3
Spectroscopy of a Highly Charged Ion Clock with Sub-Hz Uncertainty — •Lukas J. Spieß1, Steven A. King1, Peter Micke1,2, Alexander Wilzewski1, Tobias Leopold1, Erik Benkler1, Nils Huntemann1, Richard Lange1, Andrey Surzhykov1, Robert Müller1, Lisa Schmöger2, Maria Schwarz2, José R. Crespo López-Urrutia2, and Piet O. Schmidt1,3 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 3Institut für Quantenoptik, Leibniz Universität Hannover, Germany
Modern optical clocks are the most accurate metrological devices ever built. So far, such systems were only based on neutral and singly charged atoms. Potential further candidates are highly charged ions (HCI) which are intrinsically less sensitive to several types of external perturbations [1]. In previous work, we have demonstrated quantum logic spectroscopy of a HCI [2], enabling the first ever clock-like spectroscopy of these species.
We will present the first sub-Hz accuracy measurement of an optical transition in a HCI. The transition frequency of the 441 nm line in Ar13+ is compared to the electric octupole transition frequency in 171Yb+. Measurements were performed for the two isotopes 40Ar and 36Ar which yields the isotope shift at sub-Hz accuracy and provides input for theoretical studies.
[1] M. G. Kozlov et al., Rev. Mod. Phys. 90 (2018)
[2] P. Micke et al., Nature 578 (2020)