Effects of an Oscillating Electric Field on and Dipole Moment Measurement of a Single Molecular Ion

Published

May 31, 2023

Author(s)

Alejandra Collopy, Julian Schmidt, Dietrich Leibfried, David Leibrandt, Chin-wen Chou

Abstract

We characterize and model the Stark effect due to the radio-frequency (rf) electric field experienced by a molecular ion in an rf Paul trap, a leading systematic in the uncertainty of the field-free rotational transition. The ion is deliberately displaced to sample different known rf electric fields and measure the resultant shifts in transition frequencies. With this method, we determine the permanent electric dipole moment of CaH+, and find close agreement with theory. The characterization is performed by using a frequency comb which probes rotational transitions in the molecular ion. With improved coherence of the comb laser, a fractional statistical uncertainty for a transition line center of as low as 4.6×10^−13 was achieved.

Citation

Physical Review Letters

Volume

130

Issue

22

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevLett.130.223201

Local Download

Citation

Collopy, A. , Schmidt, J. , Leibfried, D. , Leibrandt, D. and Chou, C. (2023), Effects of an Oscillating Electric Field on and Dipole Moment Measurement of a Single Molecular Ion, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.130.223201, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934973 (Accessed October 13, 2025)