Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.44: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
An optical lattice clock based on Magnesium — •Waldemar Friesen-Piepenbrink, Dominika Fim, Klaus Zipfel, Steffen Rühmann, Nandan Jha, Steffen Sauer, Wolfgang Ertmer, and Ernst Rasel — Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
We present the current status of our optical lattice clock based on the strongly forbidden 1S0→3P0 transition in the bosonic 24 Mg isotope. With its small black body radiation sensitivity, magnesium is a promising candidate for an optical frequency standard.
We are able to load 104 precooled bosonic magnesium atoms into an optical lattice at the magic wavelength. Due to its low mass, a high trap depth is required to significantly suppress tunneling between adjacent lattice sites and minimize the resulting linewidth for spectroscopy. At a trap depth of 50 ERecoil we were able to perform spectroscopy of a 50 Hz linewidth with the highest Q value for magnesium. Together with an improved magnetic field setup, necessary for magnetic field induced spectroscopy, we were able to characterize the systematics of the clock with an uncertainty in the 10−15 regime.
We will give an outlook of our efforts towards further reduce the linewidth of our magnesium clock.