Inflationary Models Driven by Adiabatic Matter Creation

Details Inflationary Models Driven by Adiabatic Matter Creation Inflationary Models Driven by Adiabatic Matter Creation

1996-06-21

arxiv.org/abs/gr-qc/9606064v1

Class.Quant.Grav. 13 (1996) 2953-2964

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

25 pages, 2 figures(available from the authors), uses LATEX

Scientific paper

10.1088/0264-9381/13/11/011

The flat inflationary dust universe with matter creation proposed by Prigogine and coworkers is generalized and its dynamical properties are reexamined. It is shown that the starting point of these models depends critically on a dimensionless parameter $\Sigma$, closely related to the matter creation rate $\psi$. For $\Sigma$ bigger or smaller than unity flat universes can emerge, respectively, either like a Big-Bang FRW singularity or as a Minkowski space-time at $t=-\infty$. The case $\Sigma=1$ corresponds to a de Sitter-type solution, a fixed point in the phase diagram of the system, supported by the matter creation process. The curvature effects have also been investigated. The inflating de Sitter is a universal attractor for all expanding solutions regardless of the initial conditions as well as of the curvature parameter.

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