Hannover 2020 – scientific programme
The DPG Spring Meeting in Hannover had to be cancelled! Read more ...
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 14: Precision Measurements and Metrology
Q 14.6: Talk
Tuesday, March 10, 2020, 12:15–12:30, a310
Towards testing Local Lorentz Symmetry with 172Yb+ ions — •Chih-Han Yeh, Henning A. Fürst, Laura S. Dreissen, Dimitri Kalincev, Robin L. Stampa, R. Lange, N. Huntemann, E. Peik, André P. Kulosa, and Tanja E. Mehlstäubler — Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Deutschland
We report on an experiment for testing Local Lorentz Invariance (LLI) in the electron-photon sector [1] with 172Yb+. Previous experiments did not show an indication of LLI violation to a sensitivity level of Δ C0(2)=8× 10−21 [2] by comparing two 171Yb+ ion clocks for 45 days. With our approach, we expect a sensitivity of 4× 10−21 within 24 hours using a single ion and 10 s Ramsey dark time without the need of two operational atomic clocks at the level of 10−18 and long measurement times. We plan to test LLI via population fluctuations in the F manifold. To be first-order insensitive to magnetic field noise, we mix the Zeeman substates by dynamical decoupling [3]. To excite the highly forbidden F-state and measure its transition frequency, we used rapid adiabatic passage and demonstrated a reduced uncertainty from 700 kHz [4] to about 10Hz. In the future, we will carry out the LLI test in a multi-ion Coulomb crystal with tailored light fields via a spatial light modulator or a holographic phase plate to reach beyond the 10−22 sensitivity level.
[1] V.A. Dzuba et al., Nature Physics 12, 465-468 (2016). [2] C. Sanner et al., Nature 567, 204-208 (2019). [3] R. Shaniv et al., Phys. Rev. Lett. 120, 103202 (2018). [4] M. Roberts et al., Phys. Rev. Lett. 78, 1876 (1997).