Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 8: Precision Measurements I (joint session Q/A)
A 8.1: Talk
Monday, March 11, 2024, 17:00–17:15, HS 1221
Search for variations of fundamental constants with highly charged ion clocks — •Luis Hellmich1,2, Ullrich Schwanke1,2, Steven Worm1,2, and Lakshmi Kozhiparambil Sajith2,3 — 1Humboldt-Universität Berlin — 2DESY Zeuthen — 3MPIK Heidelberg
The measurement of the variation of fundamental constants would be strong evidence for new physics. In particular, many different theories predict the variation the fine-structure constant α. Atomic clocks are a highly precise tool of measuring variations of α, as the clock transitions may change with α.
We are aiming to compare a Sr-lattice clock as a reference to a highly charged ion (HCI) clock. HCI clocks are expected to have extremely high sensitivities to α-variations. We show how such a setup could set new limits on variations of fundamental constants. Furthermore, we estimate with Monte-Carlo simulations and real data how those limits translate to constraints on scalar dark matter models and models with Lorentz-invariance violation.
Keywords: Atomic clocks; Variation of fundamental constants; Dark matter