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Effect of Earth's rotation on the trajectories of free-fall bodies in Equivalence Principle Experiment

C. G. Shao·Y. Z. Zhang·J. Luo·Z. Z. Liu
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Abstract

Owing to Earth's rotation a free-fall body would move in an elliptical orbit rather than along a straight line forward to the center of the Earth. In this paper on the basis of the theory for spin-spin coupling between macroscopic rotating bodies we study violation of the equivalence principle from long-distance free-fall experiments by means of a rotating ball and a non-rotating sell. For the free-fall time of 40 seconds, the difference between the orbits of the two free-fall bodies is of the order of 10^{-9}cm which could be detected by a SQUID magnetometer owing to such a magnetometer can be used to measure displacements as small as 10^{-13} centimeters.

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C. G. Shao, Y. Z. Zhang, J. Luo, Z. Z. Liu. 2002-08-16. Effect of Earth's rotation on the trajectories of free-fall bodies in Equivalence Principle Experiment. https://doi.org/10.1088/0253-6102%2F39%2F3%2F297

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