Landé g Factor Measurement of 48 Ti + Using Simultaneous Comagnetometry and Quantum Logic Spectroscopy
Abstract
We present a quantum logic scheme mitigating systematic effects in the measurement of magnetic properties of ions caused by temporal magnetic field fluctuations through comagnetometry. This is achieved through simultaneous interrogation of a spectroscopy ion and a cotrapped reference ion with a precisely known g factor confined in a Paul trap. This allows measurement of the ground state g factors of a single ^{48}Ti^{+} ion with uncertainties at the 10^{-6} level in the weak B-field regime. The experimental scheme can be applied to many ions, including those that cannot be directly laser cooled. We compare the experimentally determined g factors of ^{48}Ti^{+} with new theoretical predictions using a combination of configuration interaction and second-order many-body perturbation theory. Theory and experiment agree within the expected level of accuracy.
Fields of Study & Subjects
Cold Atom Physics and Bose-Einstein Condensates
Advanced Frequency and Time Standards
Atomic and Subatomic Physics Research
Publication details
- Journal / source
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Volume
- 136
- Issue
- 8
- Pages
- 083203–083203
- Publication date
- 20 January 2026
- Language
- EN