Work

Inflationary Cosmology in Modified Gravity Theories

Year: 2015

Type: article

Abstract: We review inflationary cosmology in modified gravity such as R2 gravity with its extensions in order to generalize the Starobinsky inflation model. In particular, we explore inflation realized by three kinds of effects: modification of gravity, the quantum anomaly, and the R2 term in loop quantum cosmology. It is explicitly demonstrated that in these inflationary models, the spectral index of scalar modes of the density perturbations and the tensor-to-scalar ratio can be consistent with the Planck results. Bounce cosmology in F(R) gravity is also explained.

Source: Symmetry

DOI: 10.3390/sym7010220

Authors: Kazuharu Bamba, Sergei Odintsov

Institutions: Ochanomizu University, Tomsk State Pedagogical University, Institució Catalana de Recerca i Estudis Avançats, Institute of Space Sciences, Consejo Superior de Investigaciones Científicas

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funder: Japan Society for the Promotion of Science