![]() Our design suppresses the effects of micro-seismic and laser noise, thermal and magnetic field variations, and instrument tilt. Here we overcome this limitation by realizing a practical quantum gravity gradient sensor. 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 6. The sensing of gravity has emerged as a tool in geophysics applications such as engineering and climate research 1, 2, 3, including the monitoring of temporal variations in aquifers 4 and geodesy 5. Nature volume 602, pages 590–594 ( 2022) Cite this article
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