Early cosmological models with variable G and zero-rest-mass scalar fields.

Details Early cosmological models with variable G and zero-rest-mass scalar fields. Early cosmological models with variable G and zero-rest-mass scalar fields.

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998injpa..72..323s&link_type=abstract

Indian J. Phys. A, Vol. 72A, No. 4, p. 323 - 329

Mathematics

Logic

Cosmological Models: Gravitational Constant, Cosmology: Inflationary Universe, Cosmology: Radiation Era

Scientific paper

Einstein's field equations for a zero-curvature Robertson-Walker model of the universe with a variable gravitational 'constant' G and zero-rest-mass scalar fields are considered in which the perfect fluid satisfies the 'gamma-law' equation of state p = (γ-1)ρ. The γ-index describing the material content varies continuously with cosmological time and this allows a unified description of the early evolution of the universe. The solutions of the field equations are presented for the inflationary phase and the radiation-dominated phase. Some physical properties of the cosmological models are also discussed.

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