Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 27: Poster – Precision Spectroscopy of Atoms and Ions (joint session A/Q)
Q 27.5: Poster
Tuesday, March 3, 2026, 17:00–19:00, Philo 1. OG
Microfabricated Penning trap for quantum logic inspired CPT-tests — •Philipp Hoffmann1, Julia Coenders1, Nikita Poljakov1, Jan Schaper1, Marek Prasse1, Juan Cornejo2, Jacob Stupp1, Stefan Ulmer4,5, and Christian Ospelkaus1,3 — 1Leibniz Universität Hannover, Germany — 2Universidad de Cádiz, Spain — 3Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 4Ulmer Fundamental Symmetries Laboratory, RIKEN, Japan — 5Heinrich-Heine-Universität Düsseldorf, Germany
Within the framework of the BASE collaboration, we focused on testing CPT symmetry by performing high-precision measurements of the g-factor of protons [1] and antiprotons [2]. We aim to employ quantum logic spectroscopy [3] using a laser-cooled 9Be+ ion to improve the sampling rate and statistical uncertainty of these measurements. Sympathetic ground-state cooling will happen through coupling. Our objective is to couple [4] the mbox(anti-)proton to the 9Be+ ion, which will happen in a double-well potential. Shaping this potential is challenging, because of the different particles. Coupling is also essential for spin-state detection of the (anti-)proton. This coupling should occur within a microfabricated section of our Penning trap stack, as presented in this contribution, alongside an outline of the process for fabricating these electrodes via selective laser-induced etching (SLE) on fused silica wafers. [1] G. Schneider et. al. Science 358 (2017) [2] C. Smorra et al., Nature 550 (2017) [3] D.J.Schneider et al., Phys. Rev. A 42 (1990) [4] K. R. Brown et. al., Nature 471 (2011).
Keywords: Penning Trap; Microfabrication; quantum logic spectroscopy; g-factor; antimatter