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Title: Atom-interferometry tests of the isotropy of post-newtonian gravity
Authors: Müller, H.
Chiow, S.-W.
Herrmann, S.
Chu, S.
Chung, K.-Y. 
Issue Date: 22-Jan-2008
Citation: Müller, H., Chiow, S.-W., Herrmann, S., Chu, S., Chung, K.-Y. (2008-01-22). Atom-interferometry tests of the isotropy of post-newtonian gravity. Physical Review Letters 100 (3) : -. ScholarBank@NUS Repository.
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 up to 8×10-9g/Hz, 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 10 ppm level. Using the SME we explicitly demonstrate how the experiment actually compares the isotropy of gravity and electromagnetism. © 2008 The American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.100.031101
Appears in Collections:Staff Publications

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