Atom Interferometry tests of the isotropy of post-Newtonian gravity

Details Atom Interferometry tests of the isotropy of post-Newtonian gravity Atom Interferometry tests of the isotropy of post-Newtonian gravity

2007-10-19

arxiv.org/abs/0710.3768v2

Phys.Rev.Lett.100:031101,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Added outlook, corrected typos; to appear in PRL. 4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.100.031101

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.

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