Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 46: Precision Measurements and Metrology (Optical Clocks) (joint session Q/A)
A 46.1: Vortrag
Freitag, 9. März 2018, 10:30–10:45, K 2.013
Precision Paul trap for frequency metrology with Coulomb crystals — •André P. Kulosa, Dimitri Kalincev, Jan Kiethe, Tabea Nordmann, Nimrod Hausser, Chih-Han Yeh, Alexandre Didier, and Tanja E. Mehlstäubler — Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Deutschland
We report on our new scalable precision ion trap capable of trapping Coulomb crystals with 100 ions and more in each of the trap segments. We demonstrate that the excellent control of 3D excess micromotion over a single ion [1] also holds for a linear chain of 14 ions via spatial imaging with atomic resolution. We find that in a trap segment of our ion trap the time dilation shift due to axial micromotion is as low as 10−19 over a range of 400µm and below 10−18 within 2mm. After quench-assisted cooling of a single 172Yb+ ion to its motional ground state, we observe a heating rate of less than 1 phonon/s and in total a 1/f dependence on electric field noise induced by fluctuating charges on the trap electrodes. Based on further experimental investigations of the trap environment, we derive an uncertainty budget close to 1× 10−19 for a multi-ion clock operated with mixed In+/Yb+ crystals.
J. Keller et al., J. Appl. Phys. 118, 104501 (2015)