Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster: Quantum Optics and Photonics III
Q 57.34: Poster
Donnerstag, 14. März 2019, 16:15–18:15, S Fobau Physik
Towards Testing Lorentz Violation with 172Yb+ Ions — •Chih-Han Yeh, André P. Kulosa, Dimitri Kalincev, and Tanja E. Mehlstäubler — Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38166 Braunschweig, Germany
We report on an experiment that will test the Lorentz violation (LV) in the electron-photon sector [1] with 172Yb+ ions. Similar tests have been carried out with optical entanglement of two Ca+ ions [2] and by comparing two independent 171Yb+ clocks [3]. The maximum LV signal for Yb+ ions is a factor of 14 stronger compared to Ca+. We interrogate the 4f136s2 2F7/2 state which has a life time of about six years. Together with AN ion trap heating rate of 1ph/s our experiment will allow for extended Ramsey times of several seconds. Coherent excitation of such a long-lived state for the preparation of entangled states as in [2] requires tens of ms pulse durations, possibly being limited by magnetic field noise in our current experimental setup. Therefore, we investigate the use of dynamical decoupling [4] which allows the ions to be first-order insensitive to magnetic field noise during the interrogation by mixing the Zeeman states. Theoretically, operating dynamical decoupling with 10 ions and a Ramsey time of 10s with 48h of total measurement time would allow us to gain a factor of 10 in sensitivity compared to the current limit [3]. [1] D. Colladay and V. Alan Kostelecký, Phys. Rev. Lett. 58, 116002 (1998). [2] C. Sanner et al., arXiv:1809.10742 (2018). [3] E. Megidish et al., arXiv:1809.09807 (2018). [4] R. Shaniv et al., Phys. Rev. Lett. 120, 103202 (2018).