Atom Interferometry tests of the isotropy of post-Newtonian gravity
arXiv:0710.3768 · doi:10.1103/PhysRevLett.100.031101
Abstract
We present a test of the local Lorentz invariance of post-Newtonian gravity by monitoring Earth's gravity with a Mach-Zehnder atom interferometer that features a resolution of about 8*10^(-9)g/Hz^(1/2), the highest reported thus far. Expressed within the standard model extension (SME) or Nordtvedt's anisotropic universe model, the analysis limits four coefficients describing anisotropic gravity at the ppb level and three others, for the first time, at the 10ppm level. Using the SME we explicitly demonstrate how the experiment actually compares the isotropy of gravity and electromagnetism.
Added outlook, corrected typos; to appear in PRL. 4 pages, 3 figures
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- General Relativistic Effects in Atom Interferometry
- Limits on isotropic Lorentz violation in QED from collider physics
- Bounding Isotropic Lorentz Violation Using Synchrotron Losses at LEP
- Noise-Immune Conjugate Large-Area Atom Interferometers
- Time-delay and Doppler tests of the Lorentz symmetry of gravity