A New Apparatus for Detecting Micron-Scale Deviations from Newtonian Gravity - General Relativity and Quantum CosmologyReport as inadecuate




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Abstract: We describe the design and construction of a new apparatus for detecting orconstraining deviations from Newtonian gravity at short length scales. Theapparatus consists of a new type of probe with rotary mass actuation andcantilever-based force detection which is used to directly measure the forcebetween two micromachined masses separated by tens of microns. We present thefirst data from the experiment, and discuss the prospects of more preciselyconstraining or detecting non-Newtonian effects using this probe. Currently,the sensitivity to attractive mass-dependent forces is equal to the bestexisting limits at length scales near 5 microns. No non-Newtonian effects aredetected at that level.



Author: D. M. Weld, J. Xia, B. Cabrera, A. Kapitulnik

Source: https://arxiv.org/







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