Inflationary cosmology with scalar field and radiation

Details Inflationary cosmology with scalar field and radiation Inflationary cosmology with scalar field and radiation

1999-05-28

arxiv.org/abs/gr-qc/9905105v1

Gen.Rel.Grav. 31 (1999) 983-998

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages Latex; to appear Gen. Rel. Grav

Scientific paper

We present a simple, exact and self-consistent cosmology with a phenomenological model of quantum creation of radiation due to decay of the scalar field. The decay drives a non-isentropic inflationary epoch, which exits smoothly to the radiation era, without reheating. The initial vacuum for radiation is a regular Minkowski vacuum. The created radiation obeys standard thermodynamic laws, and the total entropy produced is consistent with the accepted value. We analyze the difference between the present model and a model with decaying cosmological constant previously considered.

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