Resolving the gravitational redshift across a millimetre-scale atomic sample.

@article{Bothwell2022ResolvingTG,
  title={Resolving the gravitational redshift across a millimetre-scale atomic sample.},
  author={Tobias Bothwell and Colin J. Kennedy and Alexander Aeppli and Dhruv Kedar and John M. Robinson and Eric Oelker and Alexander Staron and Jun Ye},
  journal={Nature},
  year={2022},
  volume={602 7897},
  pages={
          420-424
        }
}
Einstein's theory of general relativity states that clocks at different gravitational potentials tick at different rates relative to lab coordinates-an effect known as the gravitational redshift1. As fundamental probes of space and time, atomic clocks have long served to test this prediction at distance scales from 30 centimetres to thousands of kilometres2-4. Ultimately, clocks will enable the study of the union of general relativity and quantum mechanics once they become sensitive to the… 
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