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Q: Fachverband Quantenoptik und Photonik
Q 39: Posters: Quantum Optics and Photonics III
Q 39.7: Poster
Mittwoch, 11. März 2020, 16:30–18:30, Empore Lichthof
Progress towards an indium multi-ion clock — •Hartmut Nimrod Hausser, Tabea Nordmann, Jan Kiethe, Leon Schomburg, and Tanja E. Mehlstäubler — Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
Multi-ion clocks face many challenges: One of the biggest challenge is the strong electric field gradient leading to a relatively high electronic quadrupole shift. For such a clock 115In+ is an ideal candidate offering an extremely small electric quadrupole moment, a narrow-line clock transition, a transition where it is directly detectable and low systematic shifts [1]. Here we present the progress towards an indium multi-ion clock. We show the first steps towards automatization like automated fiber coupling and slave relocking. A small chip-based linear Paul trap is used to trap 115In+ and 172Yb+ in a mixed Coulomb crystal [2]. We show the implementation of a new detection system where both species can be imaged simultaneously. We present further investigations on polarization-maintaining UV fibers to deliver a Gaussian-like, intensity- and polarization-stable beam to the ions at 230.6 nm and 236.5 nm, which are the detection and clock transition wavelength of 115In+, respectively.
This project has received funding from the European Metrology Programme for Innovation and Research (EMPIR) co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme (Project No. 18SIB05 ROCIT).
[1] N. Herschbach et al., Appl. Phys. B 107, 891-906 (2012).
[2] J. Keller et al., Phys. Rev. A. 99, 013405 (2019).