Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 59: Precision Measurements and Metrology II (joint session Q/A)
Q 59.8: Poster
Thursday, March 17, 2022, 16:30–18:30, P
PTB’s transportable Al+ ion clock - concept and current status — •Constantin Nauk1, Benjamin Kraus1,2, Stephan Hannig1,2, and Piet O. Schmidt1,2,3 — 1Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany — 2DLR-Institute for Satellite Geodesy and Inertial Sensing, 30167 Hannover, Germany — 3Leibniz Universität Hannover, Institut für Quantenoptik, 30167 Hannover, Germany
Optical atomic clocks provide significantly lower fractional systematic and statistical frequency uncertainties compared to state-of-the-art microwave atomic clocks. A particularly promising candidate for high-accuracy applications is 27Al+ as its 1S0 → 3P0 transition is relatively insensitive towards external electromagnetic fields, especially to black body radiation. However, direct laser cooling of 27Al+ is more than challenging. Instead, the clock ion can be cooled sympathetically by a co-trapped and well-controllable 40Ca+ ion, which additionally allows state detection of the Al+ ion via quantum logic spectroscopy.
Besides its design, we present the current status of our transportable ion quantum logic optical clock towards fractional frequency uncertainties on the order of 10−18 and review compact and robust breadboarding for UV laser systems.