SAMOP 2021 – scientific programme
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A: Fachverband Atomphysik
A 2: Precision spectroscopy of atoms and ions (joint session A/Q)
A 2.15: Poster
Monday, September 20, 2021, 16:30–18:30, P
Towards high precision quantum logic spectroscopy of single molecular ions — •Maximilian J. Zawierucha1, Till Rehmert1, Fabian Wolf1, and Piet O. Schmidt1,2 — 1Physikalisch- Technische Bundesanstalt, Braunschweig, Germany — 2Institut für Quantenoptik, Leibniz Universität Hannover, Germany
High precision spectroscopy of trapped molecular ions constitutes a promising tool for the study of fundamental physics. Possible applications include the search for a variation of fundamental constants and measurement of the electric dipole moment of the electron.
Compared to atoms, molecules offer a rich level structure, permanent dipole moment and large internal electric fields which make them exceptionally well suited for those applications.
However, the additional rotational and vibrational degrees of freedom result in a dense level structure and absence of closed cycling transitions. Therefore, standard techniques for cooling, optical pumping and state detection cannot be applied. This challenge can be overcome by quantum logic spectroscopy.
In addition to the molecular ion, a well-controllable atomic ion is co-trapped, coupling strongly to the molecule via the Coulomb interaction. The shared motional state can be used as a bus to transfer information about the internal state of the molecular ion to the atomic ion, where it can be read out using fluorescence detection.
Here, we present the status of our experiment, aiming at high precision quantum logic spectroscopy of molecular oxygen ions.