Precision spectroscopy in Yb+ ions
Atomic Physics
2025-09-30 v1
Abstract
We report on our progress on multi-ion spectroscopy with Yb+ ions. We first characterized the spatial homogeneity of the magnetic- and the rf-field. Subsequently, to equalize the immense AC Stark shifts of the individual ions in a Coulomb crystal, we utilize a holographic phase plate to convert the Gaussian beam into a flat-top shape. These efforts enable us to excite an 8-ion crystal (172Yb+) on the highly forbidden electric octupole transition. Using 173Yb+ with reduced AC Stark shift, the same beam profile could support the multi-ion operation of 20 ions. This paves the way for future multi-ion optical clocks.
Keywords
Cite
@article{arxiv.2509.24599,
title = {Precision spectroscopy in Yb+ ions},
author = {Jialiang Yu and Kai C. Grensemann and Chih-Han Yeh and Ikbal Ahamed Biswas and Abhilasha Singh and Laura S. Dreissen and Henning A. Fürst and Tanja E. Mehlstäubler},
journal= {arXiv preprint arXiv:2509.24599},
year = {2025}
}