We report an experimental test of non-Newtonian gravitational forces at mi- crometer range. To experimentally subtract off the Casimir force and the electrostatic force background, differential force measurements were performed by sensing the lateral force between a gold sphere and a density modulated source mass using a soft cantilever. The current sensitivity is limited by the patch electrostatic force, which is further improved by two dimensional (2D) force mapping. The preliminary result sets a model independent constraint on the Yukawa type force at this range.
@article{arxiv.1607.05985,
title = {Test of non-Newtonian gravitational force at micrometer range},
author = {Pengshun Luo and Jianbo Wang and Shengguo Guan and Wenjie Wu and Zhaoyang Tian and Shanqing Yang and Chenggang Shao and Jun Luo},
journal= {arXiv preprint arXiv:1607.05985},
year = {2016}
}
Comments
Presented at the Seventh Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, June 20-24, 2016