Atom Interferometry tests of the isotropy of post-Newtonian gravity

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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 Relativity and Quantum Cosmology, Atomic Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/191375

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0710.3768
 http://arxiv.org/abs/0710.3768
 Phys.Rev.Lett.100:031101,2008
 doi:10.1103/PhysRevLett.100.031101

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arXiv