SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 59: Poster IV
Q 59.41: Poster
Thursday, March 9, 2023, 16:30–19:00, Empore Lichthof
A multi-ion indium clock — •Ingrid M. Dippel1, Moritz von Boehn1, H. Nimrod Hausser1, Jonas Keller1, Jan Kiethe1, Tabea Nordmann1, and Tanja E. Mehlstäubler1,2 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2Leibniz Universität Hannover, Hannover, Germany
Currently, single-ion optical clocks represent some of the most accurate experiments and are used in high-precision spectroscopy, metrology and geodesy [1]. Though very precise, the statistical uncertainty of these optical clocks is fundamentally limited by the low signal-to-noise ratios and require averaging times on the order of days to resolve frequencies at the limit of their systematic uncertainties at the 10−18 level. This motivates the approach to develop multi-ion systems, leading to reduced quantum projection noise (QPN) by a factor of 1/√Nion, which is limiting the statistical uncertainty of a clock. Thereby, the averaging times can be decreased by factor of Nion for a given level of statistical uncertainty.
We present an experimental set-up based on 115In+ ions sympathetically cooled by 172Yb+ ions, aiming for multi-ion operation and at the same reaching frequency unertainties on the level of 10−19 [2]. Furthermore, we discuss future plans and methods for improving robustness, reducing systematic uncertainties and extending automation of basic lab routines and measurement processes.
[1] T. E. Mehlstäubler et al., Rep. Prog. Phys. 81, 064401 (2018)
[2] J. Keller et al., Phys. Rev. A 99, 013405 (2019)