Qualitative analysis of Kantowski-Sachs metric in a generic class of f(R) models

Leon, Genly; Roque, Armando A.

Abstract

In this paper we investigate, front the dynamical systems perspective, the evolution of a Kantowski-Sachs metric in a generic class of f(R) models. re present conditions (i.e., differentiability conditions, existence of minima, monotony intervals, etc.) for a free input function related to the f(R), that guarantee the asymptotic stability of well-motivated physical solutions, specially, self-accelerated solutions, all to describe both inflationary-and late-time acceleration stages of the cosmic. evolution. We discuss which f( R) theories allows for a cosmic evolution with an acceptable matter era, in correspondence to the modern cosmological paradigm. We find a very rich behavior, and amongst others the universe can result in isotropized solutions with observables in agreement with observations, such as de Sitter, quintessence-like, or phantom solutions. Additionally, we find that a cosmological bounce and turnaround are realized in a part of the parameter-space as a consequence of the metric choice.

Más información

Título según WOS: Qualitative analysis of Kantowski-Sachs metric in a generic class of f(R) models
Título según SCOPUS: Qualitative analysis of Kantowski-Sachs metric in a generic class of f(R) models
Título de la Revista: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volumen: 2014
Número: 5
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2014
Idioma: English
DOI:

10.1088/1475-7516/2014/05/032

Notas: ISI, SCOPUS - ISI (Science Citation Index-Expanded®, ISI Alerting Services, Current Contents®/Engineering, Computing and Technology, Current Contents®/Physical, Chemical and Earth Sciences); Scopus; Inspec; Chemical Abstracts Service; GEOBASE; MathSciNet; NASA Astrophysics Data System; VINITI Abstracts Journal (Referativnyi Zhurnal); Zentralblatt MATH