A Novel Co-Magnetometer Based on Double-Probe in Situ Decoupling of Magnetic Field and Inertia Rotation

Magnetic noise and other magnetic system effects have been major factors hindering accurate measurements of exotic spin interactions. The atomic co-magnetometer uses the different spin collisions of various substances to suppress magnetic field interference and magnetic noise. However, the current suppression of magnetic noise and magnetic field interference only involves passive shielding and parameter adjustment. Here, a novel in-situ magnetic noise compensation mechanism is reported for an atomic co-magnetometer, which arises from the difference in spin polarization behavior of two alkali metals in a mixed pumping. The magnetometer, which uses the potassium-rubidium-neon-21 (K-Rb-${}^{21}\mathrm{Ne}$) system, successfully decouples the magnetic fields and inertial rotations in situ. In addition, this new paramagnetic system can be used to simultaneously measure the magnetic field and inertial rotations, improving the stability of the measurement. These findings provide new possibilities for accurate measurements, including improving the stability of inertial rotations measurement and accessing unexplored parameter spaces.