A Monte Carlo model predicts that a three-grating neutron moiré interferometer with a one-ton lead mass can measure G to 150 ppm, and reanalysis suggests lunar tides may add tens of ppm to some prior torsion pendulum results.
The phase accumulated by a neutron as the Earth rotates about a vector Ω within an interferometer with an area vector A is ∆γS = 2mN ℏ Ω· A
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Design and Monte Carlo Simulation of a Phase Grating Moir\'e Neutron Interferometer to Measure the Gravitational Constant
A Monte Carlo model predicts that a three-grating neutron moiré interferometer with a one-ton lead mass can measure G to 150 ppm, and reanalysis suggests lunar tides may add tens of ppm to some prior torsion pendulum results.