SAMOP 2021 – scientific programme
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A: Fachverband Atomphysik
A 12: Highly charged ions and their applications
A 12.3: Poster
Tuesday, September 21, 2021, 16:30–18:30, P
An Optical Clock based on a Highly Charged Ion — •Lukas J. Spieß1, Steven A. King1, Peter Micke1,2, Alexander Wilzewski1, Erik Benkler1, Tobias Leopold1, José R. Crespo López-Urrutia2, and Piet O. Schmidt1,3 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Deutschland — 2Max-Planck-Institut für Kernphysik, Heidelberg, Deutschland — 3Institut für Quantenoptik, Leibniz Universität Hannover, Deutschland
Highly charged ion (HCI) offer narrow transitions suitable for high-accuracy optical clocks with predicted uncertainties below 10−18, since they are intrinsically less sensitive to external perturbations [1]. At the same time, the strongly relativistic character of the remaining electrons renders HCI particularly sensitive to physics beyond the Standard Model. Previously, we have demonstrated that a single HCI can be extracted from a hot plasma and injected into laser-cooled Be+ ions. This allowed for the first demonstration of quantum logic spectroscopy using HCI and enabled high-precision spectroscopy [2].
Here, we will present optical-clock like interrogation of the 441 nm transition in Ar13+ and the evaluation of systematic shifts with an expected uncertainty of below 10−16 [3]. This is leading up to our absolute frequency measurement of Ar13+, which will be the first time a transition in any HCI is measured with sub-Hz accuracy.
[1] M. G. Kozlov et al., Rev. Mod. Phys. 90, 045005 (2018)
[2] P. Micke et al., Nature 578, p. 60-65 (2020)
[3] S. A. King et al., arXiv:2102.12427 (2021)