Stuttgart 2012 – scientific programme

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A: Fachverband Atomphysik

A 21: Poster: Precision spectroscopy of atoms and ions

A 21.17: Poster

Tuesday, March 13, 2012, 16:30–19:00, Poster.V

A lattice-based magnesium frequency standard — •Dominika Fim, Hrishikesh Kelkar, Andre Pape, Temmo Wübbena, André Kulosa, Steffen Rühmann, Klaus Zipfel, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany

Optical lattice clocks outperform the best microwave clocks. A key for the improvement is the confinement in a lattice at the Lamb-Dicke limit to suppress the influence of the first order Doppler effect in frequency measurements. The application of this method requires the existence of a magic wavelength for the lattice, where the AC Stark shift of the two clock states compensate each other. Thanks to these methods today’s state-of-the-art optical clocks are limited by Stark effect of the blackbody radiation (BBR). The element magnesium allows to implement an optical lattice clock and shows in addition a lower sensitivity in terms of uncertainty to BBR. We report on the status of the magnesium lattice clock at LUH.