Search for Screened Interactions Associated with Dark Energy Below the 100 Length Scale
arXiv:1604.04908 · doi:10.1103/PhysRevLett.117.101101
Abstract
We present the results of a search for unknown interactions that couple to mass between an optically levitated microsphere and a gold-coated silicon cantilever. The scale and geometry of the apparatus enables a search for new forces that appear at distances below 100 m and which would have evaded previous searches due to screening mechanisms. The data are consistent with electrostatic backgrounds and place upper limits on the strength of new interactions at fN in the geometry tested. For the specific example of a chameleon interaction with an inverse power law potential, these results exclude matter couplings in the region of parameter space where the self-coupling meV and the microspheres are not fully screened.
arXiv comment5 pages, 4 figures
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