Hybrid pumping with dual detection: a novel comagnetometer for dual-axis magnetic field and rotation measurement
Jiale Quan, Wenfeng Fan, Longyan Ma +7 more
Abstract Quantum sensing has demonstrated exceptional potential in magnetic field and inertial rotation measurements due to its ultra-high sensitivity. Among various implementations, the spin-exchange relaxation-free comagnetometer, as atomic spin sensor, exhibits remarkable sensitivity and strong potential for miniaturization and integration. However, the low-frequency performance of such comagnetometers is fundamentally limited by intrinsic noise due to the coupling between magnetic field ( B ) and inertial rotation signals ( Ω ). In this paper, a novel dual spin-polarization detection scheme for a hybrid-pumping comagnetometer is proposed. By introducing simultaneous detection of two electron spin polarizations combined with longitudinal magnetic field modulation and demodulation, our approach enables decoupling and synchronous measurement of B and Ω . The proposed scheme is experimentally validated on a K–Rb- 21 Ne comagnetometer platform. Experimental results show that the two electron species demonstrate inconsistent behaviors in the self-compensation effect, with their respective self-compensation points occurring at different operating conditions. Finally, by individually calibrating the dual spin-polarization detection outputs, real-time in situ measurements of dual-axis magnetic fields and inertial rotation are achieved, effectively addressing the crosstalk issue between magnetic and inertial signals.
Measurement Science and Technology•Aug 5, 2026•0 citations