Erlangen 2022 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 18: Precision Measurements and Metrology V (joint session Q/A)
A 18.5: Vortrag
Mittwoch, 16. März 2022, 15:00–15:15, Q-H11
Dynamical decoupling for a robust Lorentz Symmetry test with 172Yb+ ions — •Chih-Han Yeh1, Kai C. Grensemann1, Laura S. Dreissen1, Henning A. Fürst1,2, Dimitri Kalincev1, André P. Kulosa1, and Tanja E. Mehlstäubler1,2 — 1Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany — 2Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
We report on our progress of a novel test of local Lorentz invariance (LLI) in the electron-photon sector using the meta-stable electronic F-state of trapped 172Yb+ ions [1]. The Zeeman structure of the F-state contains highly relativistic, orthogonally oriented electron orbitals which provide access for testing LLI violation. A potential violation would lead to an anomalous fluctuation of the energy splitting between the substates. We measure this fluctuation via detection of the population imbalance after a dynamical decoupling (DD) [2] sequence. This sequence uses rf pulses to suppress magnetic field noise for enabling long coherence times.
Starting with a single ion, we have demonstrated coherent excitation to the F-state via an electric octupole transition [3]. A coherence time of several seconds has been achieved with the DD sequence in the F-state. With these preparations, we have recently demonstrated a 24 h-run of the LLI test sequence and are now evaluating the systematics.
[1] V.A. Dzuba et al., Nature Physics 12, 465-468 (2016). [2] R. Shaniv et al., Phys. Rev. Lett. 120, 103202 (2018). [3] H. A. Fürst et al., Phys. Rev. Lett. 125, 163001 (2020)