Rotational spectroscopy of a single molecular ion at sub part-per-trillion resolution
Atomic Physics
2024-01-04 v1
Abstract
We use quantum-logic spectroscopy (QLS) and interrogate rotational transitions of a single CaH+ ion with a highly coherent frequency comb, achieving a fractional statistical uncertainty for a transition line center of 4 x 10^-13. We also improve the resolution in measurement of the Stark effect due to the radio-frequency (rf) electric field experienced by a molecular ion in an rf Paul trap, which we characterize and model. This allows us to determine the electric dipole moment of CaH+ by systematically displacing the ion to sample different known rf electric fields and measuring the resultant shifts in transition frequency.
Keywords
Cite
@article{arxiv.2207.10215,
title = {Rotational spectroscopy of a single molecular ion at sub part-per-trillion resolution},
author = {Alejandra L. Collopy and Julian Schmidt and Dietrich Leibfried and David R. Leibrandt and Chin-Wen Chou},
journal= {arXiv preprint arXiv:2207.10215},
year = {2024}
}
Comments
5 pages, 3 figures, plus supplemental material