Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 22: Posters: Quantum Optics and Photonics II
Q 22.5: Poster
Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof
A laser sytem for sideband cooling of single 9Be+ ions in a Penning trap — •Julian Pick1, Johannes Mielke1, Teresa Meiners1, Matthias Borchert1,3, Frederik Jacobs1, Amado Bautista-Salvador1,2, Juan M. Cornejo1, Malte Niemann1, Stefan Ulmer3, and Christian Ospelkaus1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover — 2Physikalisch Technische Bundesanstalt, Braunschweig — 3Ulmer Fundamental Symmetries Laboratory, RIKEN
The BASE collaboration pursues the goal to perform high precision measurements of the (anti-)proton g-factor as tests of CPT invariance in the baryonic sector.
Quantum logic inspired cooling and readout techniques based on a co-trapped laser-cooled 9Be+ ion can potentially be applied to contribute to these measurements. However, for many of the proposed methods it is desirable for the ion to be in the motional ground state.
Here we present a Raman laser system for sideband cooling of single 9Be+ ions in a Penning trap. The system consists of three tunable cw infrared fiber-lasers and generates two beams at 313 nm via sum frequency generation and subsequent second harmonic generation. The Raman beams need to bridge the 140 GHz qubit splitting at a magnetic field of 5 T. Phase coherence is ensured by implementing an optical phase-locked loop for the infrared fiber-lasers.
We present recent progress in the implementation and characterization of the laser system, as well as the concepts for the integration of this system into the experiment.