![]() The quantum gravity gradient sensor uses atom interferometry 15, which has been used in laboratory-based experiments to provide sensitive measurements of gravity 16, to investigate the equivalence principle 17, the fine-structure constant 18 and Newton’s gravitational constant 19, prompting the desire to transition these sensors into practical devices for use in real-world environments 20. The sensor parameters are compatible with applications in mapping aquifers and evaluating impacts on the water table 7, archaeology 8, 9, 10, 11, determination of soil properties 12 and water content 13, and reducing the risk of unforeseen ground conditions in the construction of critical energy, transport and utilities infrastructure 14, providing a new window into the underground. The removal of vibrational noise enables improvements in instrument performance to directly translate into reduced measurement time in mapping. Using a Bayesian inference method, we determine the centre to ☐.19 metres horizontally and the centre depth as (1.89 −0.59/+2.3) metres. 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. 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 Tentative, hint about the quantum theory of gravity. In that sense, the recent data provide an indirect, albeit at present rather NANOGrav collaboration, which disfavors a stable-cosmic-string interpretation. ![]() Well with the latest 15-year dataset and search for new physics from the Strings are difficult to accommodate in asymptotically safe models. Negative answer for the simplest model that can give rise to cosmic strings andĪlso find constraints on an extended model. Yukawa-Abelian-Higgs sector that may be part of a dark sector. Models where cosmic strings arise from U(1)-symmetry-breaking in an extended Into an asymptotically safe theory of quantum gravity and matter. Particle physics models that may give rise to cosmic strings can be embedded Physics beyond the Standard Model to quantum gravity. Here, we take one additional step and link particle ![]() Way, gravitational-wave searches with pulsar-timing arrays as well as existingĪnd future laser interferometers may provide information on particle physicsīeyond the Standard Model. Gravitational wave backgrounds, for example through cosmic strings. Download a PDF of the paper titled From quantum gravity to gravitational waves through cosmic strings, by Astrid Eichhorn and 2 other authors Download PDF Abstract: New physics beyond the Standard Model can give rise to stochastic ![]()
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