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

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

2002-08-16

arxiv.org/abs/gr-qc/0208041v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, 4 figures

Scientific paper

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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