Analogies between electricity and gravity

Details Analogies between electricity and gravity Analogies between electricity and gravity

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004metro..41s.115b&link_type=abstract

Metrologia, Volume 41, Issue 5, pp. S115-S124 (2004).

Physics

3

Scientific paper

This is a brief history of physical analogies that begins at the time of Coulomb. Then it was universally believed that gravity, electricity and magnetism all obeyed Newton's inverse square law. The current era—dominated by quantum mechanics, general relativity, strings and inflationary cosmology—is clearly more complex. A new analogy may be helpful. Evidence is given that, in the non-relativistic limit, electricity is described by a Proca potential phgre satisfying the equation nabla2phgre - k02phgre = -rgre/epsi0 and gravity by a Helmholtz potential phgrm satisfying nabla2phgrm + k02phgrm = 4pgrGrgrm. In both equations k0 is a proposed universal constant, whose value is about 2 pgr(20/R0), where R0 is the distance from the solar system to the centre of the Milky Way. Relativistic treatments are also given.

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