Development of Levitated, Macroscopically Delocalized Atom Interferometers for a New Measurement of Newton's Constant G

Project: Research project

Project Details


Quantum mechanical measurements of G based on atom interferometric gravity gradiometers are an important complement to classical measurements, as they have a different set of systematic errors. Owing to recent advances in atomic physics, it appears that previously dominant systematic errors in atom interferometric G measurements can be highly suppressed. In the next generation of atomic G measurements, proof mass density inhomogeneities are expected to be a limiting systematic effect. This proposal aims to develop and demonstrate techniques to improve the sensitivity of atom interferometric gravity gradiometers by a factor of 100 over the current state-of-the-art. This level of sensitivity would open a path for improved atom interferometric measurements of G by allowing such measurements to trade off higher proof mass density for better density homogeneity by using single-crystal silicon, while maintaining sufficient statistical resolution in the measurement.
Effective start/end date10/1/199/30/22


  • National Institute of Standards and Technology (60NANB19D168 AMD 2)


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