SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Poster I
A 12.15: Poster
Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof
Identification of highly-forbidden optical transitions in highly charged ions — •Shuying Chen1, Lukas J. Spieß1, Steven A. King1, Alexander Wilzewski1, Malte Wehrheim1, 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
Optical clocks are the most accurate measurement devices and have been used in many applications from metrology to fundamental physics. Highly charged ions (HCI) have advantages as references in optical clocks, being less sensitive to external fields perturbations [1]. Recently, our group has demonstrated the first HCI clock based on Ar13+ [2], using quantum logic spectroscopy (QLS) to to readout the internal state of the HCI. The statistical uncertainty was mostly limited by the excited state lifetime of 10 ms. An improved HCI clock is under consideration using a transition with an excited state lifetime >1s. The biggest challenge of the proposed HCI clock species is the large frequency uncertainty of their transitions, mostly obtained from ab initio atomic structure calculations with percent-level uncertainties corresponding to a few terahertz. Here we propose and assess various experimental search techniques, including an off-resonant optical dipole force [3], to find transitions for the next generation HCI clocks in a feasible time scale. [1] M. G. Kozlov, et al., Rev. Mod. Phys. 90, 045005 (2018) [2] S. A. King, L. J. Spieß, et al., Nature 611, 43-47 (2022). [3] F. Wolf, et al., Nature 530, 457-460 (2016).