Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 33: Poster VI
A 33.14: Poster
Donnerstag, 14. März 2024, 17:00–19:00, Tent A
Fundamental physics tests with an optical clock based on Ca14+ — •Malte Wehrheim1, Lukas J. Spiess1, Alexander Wilzewski1, Shuying Chen1, Jan Richter1, Agnese Mariotti4, Elina Fuchs4, Andrey Surzhykov1,5, Erik Benkler1, Melina Filzinger1, Nils Huntemann1, José R. Crespo Lopez-Urrutia2, and Piet O. Schmidt1,3 — 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 — 4Institut für Theoretische Physik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany — 5Technische Universität Braunschweig, Universitätsplatz 2, 38106 Braunschweig, Germany
We conduct quantum logic spectroscopy on highly charged ions enabling us to measure atomic parameters which are compared to ab-initio calculations. Clock operation is performed by stabilizing a laser to the 3P0 → 3P1 fine structure transition in Ca14+. Its absolute frequency is determined by comparing it to the atomic clock based on the Yb+ octupole transition at PTB. Measurements of the five stable isotopes of calcium with even number of nucleons to 2 parts in 1016 yield the isotope shifts with a fractional uncertainty of 2*10−10. By combining this result with spectroscopy data in singly charged calcium and precise measurements of the nuclear masses, bounds can be placed on a hypothetical fifth force.
Keywords: Highly charged ions; Atomic Clocks; King Plots; Fundamental Physics