title: New Test of the Gravitational Inverse-Square Law at the Submillimeter Range with Dual Modulation and Compensation.
abstract: By using a torsion pendulum and a rotating eightfold symmetric attractor with dual modulation of both the interested signal and the gravitational calibration signal, a new test of the gravitational inverse-square law at separations down to 295  μm is presented. A dual-compensation design by adding masses on both the pendulum and the attractor was adopted to realize a null experiment. The experimental result shows that, at a 95% confidence level, the gravitational inverse-square law holds (|α|≤1) down to a length scale λ=59  μm. This work establishes the strongest bound on the magnitude α of Yukawa-type deviations from Newtonian gravity in the range of 70-300  μm, and improves the previous bounds by up to a factor of 2 at the length scale λ≈160  μm.
authors.affiliation: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
authors.forename: Wen-Hai
authors.initials: WH
authors.lastname: Tan
authors.affiliation: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
authors.forename: Shan-Qing
authors.initials: SQ
authors.lastname: Yang
authors.affiliation: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
authors.forename: Cheng-Gang
authors.initials: CG
authors.lastname: Shao
authors.affiliation: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
authors.forename: Jia
authors.initials: J
authors.lastname: Li
authors.affiliation: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
authors.forename: An-Bin
authors.initials: AB
authors.lastname: Du
authors.affiliation: School of Electrical and Electronic Engineering, Wuhan Polytechnic University, Wuhan 430000, People's Republic of China.
authors.forename: Bi-Fu
authors.initials: BF
authors.lastname: Zhan
authors.affiliation: School of Science, Hubei University of Automotive Technology, Shiyan 442002, People's Republic of China.
authors.forename: Qing-Lan
authors.initials: QL
authors.lastname: Wang
authors.affiliation: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
authors.forename: Peng-Shun
authors.initials: PS
authors.lastname: Luo
authors.affiliation: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
authors.forename: Liang-Cheng
authors.initials: LC
authors.lastname: Tu
authors.affiliation: MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.|Sun Yat-sen University, Guangzhou 510275, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Luo