Precision measurement of the Newtonian gravitational constant using cold atoms

@article{Rosi2014PrecisionMO,  title={Precision measurement of the Newtonian gravitational constant using cold atoms},  author={Gabriele Rosi and Fiodor Sorrentino and Luigi Cacciapuoti and Marco Prevedelli and Guglielmo Maria Tino},  journal={Nature},  year={2014},  volume={510},  pages={518-521},  url={https://api.semanticscholar.org/CorpusID:4469248}}
The precise determination of G is reported using laser-cooled atoms and quantum interferometry to identify the systematic errors that have proved elusive in previous experiments, thus improving the confidence in the value of G.

639 Citations

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43 References

Determination of the newtonian gravitational constant using atom interferometry.

Freely falling samples of laser-cooled rubidium atoms are used in a gravity gradiometer to probe the field generated by nearby source masses to measure the Newtonian gravitational constant G based on cold-atom interferometry.

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We determined the Newtonian constant of gravitation G by interferometrically measuring the change in spacing between two free-hanging pendulum masses caused by the gravitational field from large…

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The apparatus has been completely rebuilt and extensive tests carried out on the key parameters needed to produce a new value for G, which confirms the discrepancy of the results with the CODATA value and highlights the wide divergence that now exists in recent values of G.

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