2025/09/07 by Sato, Tomoya, Hosoya, Toshiyuki, Miranda, Martin +3
#Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Quantum Physics (quant-ph)
paper · doi:10.48550/arxiv.2509.05942
We present a theoretical proposal and simulation study of a digital closed-loop thermal atomic-beam interferometer offering high bandwidth, wide dynamic range, and simultaneous absolute acceleration and rotation sensing, suitable for inertial navigation applications. The scheme synchronizes phase biasing with momentum-kick reversal through the atomic transit time of the interferometer, extracting four interferometric phases to suppress Raman beam path-length errors, while two-photon detuning feedback maintains a pseudo-inertial frame and eliminates cross-coupling. In simulations with a 170∘ \rm C 85Rb beam and an interferometer arm length of 100~mm, the approach achieves sensitivities of 3\rm μm / s2 / √(Hz) (velocity random walk) and 15\rm μdeg / √(h) (angular random walk), surpassing state-of-the-art inertial sensors.