Sources of symmetric potentials

Details Sources of symmetric potentials Sources of symmetric potentials

1997-03-03

arxiv.org/abs/gr-qc/9703006v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, plain TeX, unpublished preprint from 1990, referred to in gr-qc/9611051

Scientific paper

Laboratory experiments on gravitation are usually performed with objects of constant density, so that the analysis of the forces concerns only the geometry of their shape. In an ideal experiment, the shapes of the constituent parts will be optimised to meet certain mathematical criteria, which ensure that the experiment has maximal sensitivity. Using this idea, the author suggested an experiment to determine the departure of the gravitational force from Newton's force law [1]. The geometrical problem which has to be solved is to find two shapes which differ significantly, but have the same Newtonian potential. Essentially, the experiment determines whether the two objects are distinguishable by their gravitational force. Here, we consider the case when one of them is a round ball. The result, Theorem 1, establishes a fact which appeared in numerical simulations, that the second object has to have a hole in it.

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