Bonn 2025 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 17: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)
Q 17.1: Hauptvortrag
Montag, 10. März 2025, 17:00–17:30, HS PC
Precision Measurements to Test Theory at ALPHATRAP — •Matthew Bohman1, Fabian Heisse1, Charlotte König1, Ivan Kortunov2, Jonathan Morgner1, Victor Vogt2, Klaus Blaum1, Stephan Schiller2, and Sven Sturm1 — 1Max-Planck-Institut für Kernphysik, 69117 Heidelberg — 2Institute für Experimentalphysik, Univ. Düsseldorf, 40225, Düsseldorf
ALPHATRAP [1] is a Penning-trap apparatus located at MPIK in Heidelberg used to perform high-precision measurements of simple atomic systems. In few-electron highly charged ions, the bound electron g-factor is a highly sensitive probe of new physics and its measurement allows us to test quantum electrodynamics (QED) at extremely high fields with sub-ppb accuracy, which we have recently done with H-like, Li-like, and B-like tin [2]. However, Penning trap g-factor experiments also provide unique opportunities to perform experiments on simple molecular ions such as HD+ and H2+. We have recently developed techniques to track the hyperfine and ro-vibrational state of a single HD+ ion in the presence of external perturbations, and were able to prepare the ion in the ro-vibrational ground state and measure the hyperfine structure and bound electron g-factor to high precision [3], laying the foundation for upcoming high-precision laser spectroscopy of HD+ that will allow us to test QED and extract fundamental constants.
[1] Sturm, S. et al. Eur. Phys. J. Spec. Top. 227, 14251491 (2019).
[2] Morgner, J., Tu, B., König, C. et al. Nature 622, 5357 (2023).
[3] C. König, F. Heiße, J. Morgner, et al. In preparation.
Keywords: Highly charged ions; Penning traps; Precision measurement