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Q: Fachverband Quantenoptik und Photonik
Q 25: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)
Q 25.1: Hauptvortrag
Dienstag, 3. März 2026, 11:00–11:30, N 3
Stringent Tests of the Standard Model via High-Precision Measurements at ALPHATRAP — •Fabian Heiße1, Matthew Bohman1, Luca Geißler1, Anton Gramberg1, Philipp Justus1, Charlotte König1, Ivan Kortunov2, Jialin Liu1, Jonathan Morgner1, Jacob Schrader1, Victor Vogt2, Stephan Schiller2, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Institut für Experimentalphysik, Univ. Düsseldorf, Düsseldorf
The Standard Model describes a broad range of physical phenomena but remains incomplete. Therefore, it is of utmost importance to verify its foundational theories in all their facets. The ALPHATRAP experiment is a dedicated cryogenic Penning-trap apparatus, designed for this exact purpose [1]. It enables measurements of bound electron g-factors ranging from light molecular hydrogen ions to heavy highly charged ions using non-destructive single ion spectroscopy techniques.
I will present the measurements of the bound electron g-factor in H-like, Li-like, and B-like tin ions (Z=50) with 0.5 parts-per-billion precision. There, extreme electric field strength up to 1015 V/cm act on the electron, magnifying QED effects and allowing to test them via the comparison with theory [2]. Finally, I will show the results of the hyperfine microwave and rovibrational laser spectroscopy of the HD+ ion [3]. These are essential for future matter-antimatter comparisons.
[1] Sturm et al., Eur. Phys. J. Spec. Top. 227, 1425 (2019).
[2] Morgner et al., Nature 622, 5357 (2023).
[3] König et al., Phys. Rev. Lett. 134, 163001 (2025).
Keywords: High-Precision Measurements; Highly charged ions; QED Tests; Penning traps