Vector Magnetometry with RF-driven Zeeman Rabi Oscillations in Hot Atomic Vapor

Optically pumped magnetometers based on spin-polarized alkali atoms are powerful tools for ultra-sensitive magnetic field measurements, achieving sub-fT precision, but accurate vector measurements remain challenging. In this work, I present a vector magnetometry technique based on RF-driven Rabi oscillations between adjacent Zeeman sublevels in the ground state manifolds of 87Rb. A Floquet-based modeling and calibration framework is developed to account for key systematic effects and accurately map measured Rabi frequencies to magnetic field direction. This approach enables accurate and sensitive vector measurements in a single-optical-axis microfabricated vapor cell platform and generalizes naturally to other atomic systems.