Hannover 2016 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 30: Precision spectroscopy of atoms and ions (with Q)

A 30.9: Poster

Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof

Towards a quantum logic based CPT test using single trapped (anti-)protons — •Teresa Meiners¹, Malte Niemann¹, Anna-Greta Paschke¹, Matthias Borchert¹, Alexander Idel¹, Johannes Mielke¹, Amado Bautista-Salvador^1,2, Stefan Ulmer³, and Christian Ospelkaus^1,2 — ¹Institut für Quantenoptik, Universität Hannover — ²Physikalisch Technische Bundesanstalt, Braunschweig — ³Ulmer Initiative Research Unit, RIKEN

We present sympathetic laser cooling and detection concepts for a CPT test based on a g-factor comparison between single protons and antiprotons in a Penning trap. Following the proposal by Heinzen and Wineland [1] the (anti-)proton can be coupled to a laser-cooled (beryllium) ion to achieve reliable preparation near the motional ground state, reducing systematic uncertainties and difficulties in state detection using the continuous Stern-Gerlach effect. Using sideband cooling techniques to the motional ground state, quantum logic spectroscopy can provide an alternative readout scheme.

We discuss ion trap geometries and state transfer schemes as well as laser systems and optical systems for loading, manipulating and detecting the atomic ion. We acknowledge funding by the ERC (ERC StG QLEDS). This project is supported by the BASE collaboration.

[1] Heinzen and Wineland, PRA 42, 2977 (1990)