Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 64: Poster – Precision Spectroscopy of Atoms and Ions (joint session A/Q)

Q 64.19: Poster

Donnerstag, 13. März 2025, 17:00–19:00, Tent

Probing physics beyond the standard model using ultracold mercury — •Thorsten Groh, Sascha Heider, and Simon Stellmer — Physikalisches Institut der Universität Bonn, Nussallee 12, 53115 Bonn

Mercury, being one of the heaviest laser-coolable elements, is an ideal platform for beyond standard model physics like baryon asymmetry searches [1]. Additionally excellent for isotope shift spectroscopy [2, 3] it possesses five naturally occuring bosonic isotopes, all of which we laser cool in our lab.

We report on deep-UV isotope shift spectroscopy of all stable bosonic mercury isotopes on multiple transitions, where we observe strong deviations from linearity. Furthermore, we report on recent improvements and upgrades to the machine for transferring magneto-optically trapped mercury atoms to a high power optical dipole trap giving an outlook to beyond state-of-the-art measurements of the atomic electric dipole moment of mercury.

[1] Graner PRL 116,161601 (2016)

[2] Delaunay, PRD 96, 093001 (2017)

[3] Berengut, PRL 120, 091801 (2018)

Keywords: mercury; EDM; isotope shift spectroscopy; UV; dipole trap