Freiburg 2024 – scientific programme

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A: Fachverband Atomphysik

A 22: Highly Charged Ions and their Applications I

A 22.7: Talk

Wednesday, March 13, 2024, 16:00–16:15, HS 1098

Analyzing heavy elemental polyatomic molecular ions for tests of fundamental physics — •Carsten Zülch, Konstantin Gaul, Steffen M. Giesen, and Robert Berger — Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany

Recently, we proposed diatomic highly charged molecular ions for precision tests of fundamental physics [1]. These provide unique, compressed electronic spectra — an effect which can be exploited in the search for a spatio-temporal variation of fundamental constants —, long trapping times and sympathetical coolability [2]. Polyatomic molecules possess more internal degrees of freedom and can exhibit internal comagnetometer states as well as internally broken symmetries [3,4]. Thus, polyatomic molecular ions promise to advance quantum information sciences, cold chemistry and collisions, high precision spectroscopy and therewith the search for symmetry violation beyond the Standard Model. In this contribution we investigate a multitude of polyatomic molecular ions in respect of their electronic structure, spectroscopic constants and enhancement factors of symmetry violating properties in a broken-symmetry quasirelativistic mean-field ansatz such as PaNC³⁺ or PaNCS³⁺. We subsequently account for electron correlation using two-component many-body perturbation theory.

[1] Zülch, Gaul, Giesen, Garcia Ruiz, Berger, arXiv 2203.10333.

[2] Zülch, Gaul, Berger, Isr. J. Chem. 2023, 63, e202300035.

[3] Isaev, Berger, PRL 2016, 116; Kozyryev et al., JPB 2016, 49.

[4] Isaev et al., JPB 2017, 50; Kozyryev et al., PRL 2017, 119.

Keywords: New-Physics; Relativistic-Quantum-Chemistry; Highly-Charged-Molecular-Ions; Laser-Cooling; ZORA