Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 26: Poster – Precision Measurement, Metrology, and Quantum Effects
Q 26.10: Poster
Dienstag, 11. März 2025, 14:00–16:00, Tent
Towards a transportable Al+ optical clock — •Joost Hinrichs1,2, Constantin Nauk1,2, Gayatri Sasidharan1,2, Vanessa Galbierz1, Sofia Herbers1, Benjamin Kraus1, and Piet O. Schmidt1,2 — 1Physikalisch Technische Bundesanstalt, 38116 Braunschweig, Germany — 2Leibniz University Hannover, 30167 Hannover, Germany
Optical atomic clocks are precise measurement tools, which achieve fractional frequency uncertainties on the order of 10−18 and below. We are setting up a transportable Al+ clock to use this high accuracy for height measurements in relativistic geodesy and side-by-side clock comparisons, as a step to a future redefinition of the SI-Second.
Our fully rack integrated clock setup is based on the 1S0→3P0 transition in 27Al+. A co-trapped 40Ca+ ion allows state detection and cooling through quantum logic spectroscopy and sympathetic cooling.
We present our progress on loading and Doppler cooling Ca+, first spectroscopy measurements of the Ca+ 2S1/2→2D5/2 logic transition, and the characterization of our segmented trap. In addition, the clock hardware integrated in 19" racks is presented. It includes the laser systems, a physics package with a room temperature vacuum setup and a multilayer chip trap.
Keywords: optical clocks; ion trapping; transportable