Inhomogeneous scalar field solutions and inflation

Details Inhomogeneous scalar field solutions and inflation Inhomogeneous scalar field solutions and inflation

1999-07-16

arxiv.org/abs/gr-qc/9907056v1

Int.J.Mod.Phys. D8 (1999) 705-718

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

LaTex file, 14 pages

Scientific paper

10.1142/S0218271899000511

We present new exact cosmological inhomogeneous solutions for gravity coupled to a scalar field in a general framework specified by the parameter $\lambda$. The equations of motion (and consequently the solutions) in this framework correspond either to low-energy string theory or Weyl integrable spacetime according to the sign of $\lambda$. We show that different inflationary behaviours are possible, as suggested by the study of the violation of the strong energy condition. Finally, by the analysis of certain curvature scalars we found that some of the solutions may be nonsingular.

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