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^ C ^85Rb beam and an interferometer arm length of 100~mm, the approach achieves sensitivities of 3 μm / s² / Hz (velocity random walk) and 15 μdeg / h (angular random walk), surpassing state-of-the-art inertial sensors.
Sato et al. (Sun,) studied this question.