Improvement for Testing the Gravitational Inverse-Square Law at the Submillimeter Range.

  title={Improvement for Testing the Gravitational Inverse-Square Law at the Submillimeter Range.},
  author={Wen-Hai Tan and An-Bin Du and Wen Dong and Shanqing Yang and Cheng-Gang Shao and Sheng-Guo Guan and Qing-Lan Wang and Bifu Zhan and Pengshun Luo and Liang-Cheng Tu and Jun Luo},
  journal={Physical review letters},
  volume={124 5},
We improve the test of the gravitational inverse-square law at the submillimeter range by suppressing the vibration of the electrostatic shielding membrane to reduce the disturbance coupled from the residual surface potential. The result shows that, at a 95% confidence level, the gravitational inverse-square law holds (|α|≤1) down to a length scale λ=48  μm. This work establishes the strongest bound on the magnitude α of the Yukawa violation in the range of 40-350  μm, and improves the previous… 

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