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- Title
Variation of the Gravitational Constant in the Radiation-Dominated Universe.
- Authors
Williams, L. L.
- Abstract
The unification of classical electrodynamics and general relativity within the context of five-dimensional general relativity (Kaluza, 1921, and Thiry, 1948) contains a scalar field whichmay be identified with the gravitational constant, G. The field equations of this theory are solved under conditions of the Robertson-Walker metric for flat space, for a radiation-dominated universe-a model appropriate for the early history of our universe. This leads to a cosmology wherein G is inversely proportional to the Robertson- Walker scale factor. This result is discussed in the context of the Dirac large number hypothesis and in the context of an expression for G in terms of atomic constants.
- Subjects
GRAVITATIONAL constant; RADIATION; ELECTRODYNAMICS; GENERAL relativity (Physics); SCALAR field theory; ATOMIC units; NUMERICAL solutions to equations; UNIVERSE
- Publication
Physics Research International, 2012, p1
- ISSN
2090-2220
- Publication type
Article
- DOI
10.1155/2012/567873