Vector-field model with compensated cosmological constant and radiation-dominated FRW phase

Details Vector-field model with compensated cosmological constant and radiation-dominated FRW phase Vector-field model with compensated cosmological constant and radiation-dominated FRW phase

2011-08-09

arxiv.org/abs/1108.1995v5

Int. J. Mod. Phys. D 21 (2012) 1250025

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, v5: published version (but with a small change in the Note Added)

Scientific paper

10.1142/S0218271812500253

A special model of a massless vector-field is presented, which has an extra modified-gravity-type interaction term in the action. The cosmology of the model is studied with standard noninteracting relativistic matter added. It is found that this cosmology can have an early phase where the vector-field starts to compensate a (Planck-scale) cosmological constant and a late Friedmann-Robertson-Walker (FRW) phase where the relativistic-matter energy density dominates the dynamic vacuum energy density.

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