Quantum sensing for gravity cartography.
Quantum sensing for gravity cartography.
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DOI：
10.1038/s41586-021-04315-3
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发表时间：
2022-03
期刊：
影响因子：
64.8
通讯作者：
Holynski M
中科院分区：
文献类型：
--
作者：
Stray B;Lamb A;Kaushik A;Vovrosh J;Rodgers A;Winch J;Hayati F;Boddice D;Stabrawa A;Niggebaum A;Langlois M;Lien YH;Lellouch S;Roshanmanesh S;Ridley K;de Villiers G;Brown G;Cross T;Tuckwell G;Faramarzi A;Metje N;Bongs K;Holynski M
重力感测已成为地球物理学应用的一种工具，如工程和气候研究，包括监测含水层和大地测量的时间变化。然而，这是不切实际的使用重力制图来解决米级地下功能，因为需要很长的测量时间来消除振动噪声。在这里，我们通过实现实用的量子重力梯度传感器来克服这一限制。我们的设计抑制了微震和激光噪声，热和磁场变化，以及仪器倾斜的影响。该仪器的统计不确定度为20 E（1 E = 10−9 s−2），并用于在8.5米长的线路上进行0.5米空间分辨率的测量，探测到信噪比为8的2米隧道。使用贝叶斯推理方法，我们确定中心水平为±0.19米，中心深度为（1.89 - 0.59/+2.3）米。振动噪声的去除使得仪器性能的改善能够直接转化为标测中测量时间的减少。传感器参数与以下应用兼容：绘制含水层图、评估对地下水位的影响、考古学、确定土壤特性和含水量，以及在建设关键能源、运输和公用事业基础设施时减少不可预见的地面条件风险，从而为地下提供一个新的窗口。一项研究报告了一种量子重力梯度传感器，其设计消除了长时间测量的需要，并演示了城市环境中地下隧道的检测。
The sensing of gravity has emerged as a tool in geophysics applications such as engineering and climate research, including the monitoring of temporal variations in aquifers and geodesy. However, it is impractical to use gravity cartography to resolve metre-scale underground features because of the long measurement times needed for the removal of vibrational noise. Here we overcome this limitation by realizing a practical quantum gravity gradient sensor. Our design suppresses the effects of micro-seismic and laser noise, thermal and magnetic field variations, and instrument tilt. The instrument achieves a statistical uncertainty of 20 E (1 E = 10−9 s−2) and is used to perform a 0.5-metre-spatial-resolution survey across an 8.5-metre-long line, detecting a 2-metre tunnel with a signal-to-noise ratio of 8. Using a Bayesian inference method, we determine the centre to ±0.19 metres horizontally and the centre depth as (1.89 −0.59/+2.3) metres. The removal of vibrational noise enables improvements in instrument performance to directly translate into reduced measurement time in mapping. The sensor parameters are compatible with applications in mapping aquifers and evaluating impacts on the water table, archaeology, determination of soil properties and water content, and reducing the risk of unforeseen ground conditions in the construction of critical energy, transport and utilities infrastructure, providing a new window into the underground. A study reports a quantum gravity gradient sensor with a design that eliminates the need for long measurement times, and demonstrates the detection of an underground tunnel in an urban environment.
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影响因子：
2.9
作者：
McGuirk, JM;Foster, GT;Kasevich, MA
通讯作者：
Kasevich, MA
影响因子：
18.3
作者：
Abbott, Benjamin W.;Bishop, Kevin;Pinay, Gilles
通讯作者：
Pinay, Gilles
影响因子：
3.3
作者：
Louchet-Chauvet, Anne;Farah, Tristan;Dos Santos, Franck Pereira
通讯作者：
Dos Santos, Franck Pereira
DOI：
10.1109/jrproc.1959.287136
发表时间：
1959-01-01
影响因子：
--
作者：
BRENNAN, DG
通讯作者：
BRENNAN, DG
影响因子：
64.8
作者：
Kovachy, T.;Asenbaum, P.;Kasevich, M. A.
通讯作者：
Kasevich, M. A.