The evolution of inhomogeneities in inflationary models in the theory of gravitation with higher derivatives

Details The evolution of inhomogeneities in inflationary models in the theory of gravitation with higher derivatives The evolution of inhomogeneities in inflationary models in the theory of gravitation with higher derivatives

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987zhetf..93..769k&link_type=abstract

Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki (ISSN 0044-4510), vol. 93, Sept. 1987, p. 769-783. In Russian.

Astronomy and Astrophysics

Astronomy

17

Astronomical Models, Big Bang Cosmology, Gravitation Theory, Inhomogeneity, Universe, Einstein Equations, Isotropic Media, Numerical Integration, Perturbation Theory, Poincare Spheres, Scalars

Scientific paper

The evolution of a weakly inhomogeneous universe is considered within the framework of the theory of gravitation with higher derivatives. It is shown that, for a broad class of initial conditions, the period of inflationary expansion of the background isotropic model is realized as a quasi-de Sitter intermediate asymptotic regime. The problem of the evolution of scalar perturbations of the metric is solved, and for pure R2 gravitation the results are obtained in an analytical form. Numerical integration of the equations reveals that the qualitative behavior of the perturbations does not change in models with a conformal anomaly in which the polarization terms are taken into account.

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