Bonn 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 2: Precision Spectroscopy of Atoms and Ions I (joint session A/Q)
A 2.1: Hauptvortrag
Montag, 10. März 2025, 11:00–11:30, HS PC
Towards an optical atomic clock based on Ni12+ — •Malte Wehrheim1, Lukas J. Spieß1, Shuying Chen1, Alexander Wilzewski1, Piet O. Schmidt1,3, and José R. Crespo Lopez-Urrutia2 — 1Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany — 2Max-Planck-Instituts für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 3Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
Highly charged ion (HCI) optical clocks offer reduced susceptibility to systematic shifts due to the high binding energies of the remaining electrons. Our experimental setup allows the co-trapping of individual HCI with Be+ for sympathetic cooling and quantum logic readout. In the past, this approach allowed us to measure absolute frequencies of optical transitions in HCI with uncertainties in the low 10−16 range limited by the ions* short excited-state lifetime of around 10 ms [1].
In this work, we present the progress towards an improved HCI clock based on Ni12+, with expected systematic uncertainties at the low 10−18 level and reduced instability due to its long excited-state lifetime of ∼20 seconds, enabling long interrogation times. We report on the initial transition search [2] and the first spectroscopy of the dipole-forbidden clock transition, paving the way for a new generation of high accuracy optical clocks.
[1] S. A. King, L. J. Spiess, et al., Nature 611, 43 (2022)
[2] S. Chen, et al., Phys. Rev. Appl. 22, 054059 (2024)
Keywords: Atomic clocks; Highly charged ions; optical clock; qunatum logic; high precision spectroscopy