Theoretical Proposal of a Digital Closed-Loop Thermal Atomic-Beam Interferometer for High-Bandwidth, Wide-Dynamic-Range, and Simultaneous Absolute Acceleration-Rotation Sensing

• URL: http://arxiv.org/abs/2509.05942v1
• Date: Sun, 07 Sep 2025 06:14:31 GMT
• Title: Theoretical Proposal of a Digital Closed-Loop Thermal Atomic-Beam Interferometer for High-Bandwidth, Wide-Dynamic-Range, and Simultaneous Absolute Acceleration-Rotation Sensing
• Authors: Tomoya Sato, Toshiyuki Hosoya, Martin Miranda, Hiroki Matsui, Yuki Miyazawa, Mikio Kozuma,
• Abstract summary: The scheme synchronizes phase biasing with momentum-kick reversal through the atomic transit time of the interferometer.<n>Two-photon detuning feedback maintains a pseudo-inertial frame and eliminates cross-coupling.<n>The approach sensitivities of $3rm mu m / s2 / sqrtHz$ (velocity random walk) and $15rm mu deg / sqrth$ (angular random walk) surpass state-of-the-art inertial sensors.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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 $170^{\circ} {\rm C}$ $^{85}$Rb beam and an interferometer arm length of 100~mm, the approach achieves sensitivities of $3{\rm \mu m / s^2 / \sqrt{Hz}}$ (velocity random walk) and $15{\rm \mu deg / \sqrt{h}}$ (angular random walk), surpassing state-of-the-art inertial sensors.

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