2025/10/17 by Mario A. Maldonado, Maldonado, M. A., Yang Li +13
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Quantum optics and atomic interactions
paper · pdf · doi:10.48550/arxiv.2510.16159
openalex publication_date 2025/10/17 · openalex created_date 2025/10/22 · openalex updated_date 2026/07/28
We demonstrate a suppression of the light shift in a Coherent-Population-Trapping (CPT) atomic magnetometer by using linearly polarized light and a differential measurement between magnetic resonances. The radio frequency that creates the optical sidebands for CPT quickly switches between two magnetic sensitive transitions and the magnetic field is extrapolated from the difference of the center frequencies of the magnetic resonances. Light shifts and common drifts like collisional shifts can be suppressed through careful choice of measured resonances and we show the light shift reduction by more than a factor of 20 compared to excitation with circular polarized light. Various limitations to the method are discussed.