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arXiv · 2409.08550

Adaptive Robust High-Precision Atomic Gravimetry

Jinye Wei·Jiahao Huang·Chaohong Lee
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Abstract

Atomic gravimeters are the most accurate sensors for measuring gravity, yet a significant challenge lies in achieving high precision while also maintaining high dynamic range and robustness. Here, we develop a protocol for achieving robust high-precision atomic gravimetry based upon adaptive Bayesian quantum estimation. Our protocol incorporates a sequence of interferometry measurements taken with short to long interrogation times and offers several crucial advantages. Firstly, it enables a high dynamic range without the need to scan multiple fringes for pre-estimation, making it more efficient than the conventional frequentist method. Secondly, it improves robustness against noise, allowing for a significant improvement in measurement precision in noisy environments. The enhancement can be more than 5 times for a transportable gravimeter [Sci. Adv. 5, eaax0800 (2019)] and up to an order of magnitude for a state-of-the-art fountain gravimeter [Phys. Rev. A 88, 043610 (2013)]. Notably, by optimizing the interferometry sequence, our approach can improve the scaling of the measurement precision ($Δg_{est}$) versus the total interrogation time ($\tilde{T}$) to $Δg_{est} \propto \tilde{T}^{-2}$ or even better, in contrast to the conventional one $Δg_{est} \propto \tilde{T}^{-0.5}$. Our approach offers superior precision, increased dynamic range, and enhanced robustness, making it highly promising for a range of practical sensing applications.

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Jinye Wei, Jiahao Huang, Chaohong Lee. 2025-01-07. Adaptive Robust High-Precision Atomic Gravimetry. https://arxiv.org/abs/2409.08550

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