SAMOP 2023 – scientific programme

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A: Fachverband Atomphysik

A 13: Highly Charged Ions and their Applications I

A 13.1: Invited Talk

Wednesday, March 8, 2023, 11:00–11:30, F107

Investigation of Molecular Ions as Sensitive Probes for Fundamental Physics — •Carsten Zuelch, Konstantin Gaul, and Robert Berger — Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany

Small polar molecules provide large enhancements of P,T-odd effects due to large internal fields, which are further increased by using heavy elements as metal center. Molecular ions would give additional benefits: From an experimental point of view, ions have the advantage that they can be guided by electric fields, sympathetically cooled and trapped for long times, possibly opening a path for subsequent direct laser cooling. Further, with increasing charge the electronic spectra become typically compressed, which is favourable for the search of a spatio-temporal variation of fundamental constants. But with the compressed level structure arise different challenges like the need for an analysis of congested rovibronic spectra. At present, comparatively little is known about the detailed electronic structure of small molecular ions containing short-lived nuclei, since only recently advances in precision spectroscopy made the study of such systems possible. Therefore, an extensive theoretical investigation on different systems is needed to find suitable molecular ions for future fundamental physics research, faciliated by current developments in theory. Our estimations for symmetry-violating properties and laser-coolability are based on calculations on the level of two-component complex generalized Hartree-Fock (cGHF) and Kohn Sham (cGKS), with properties being subsequently obtained with our toolbox approach.