Work

Nonminimal torsion-matter coupling extension of f(T) gravity

Year: 2014

Type: article

Abstract: We construct an extension of $f(T)$ gravity with the inclusion of a nonminimal torsion-matter coupling in the action. The resulting theory is a novel gravitational modification, since it is different from both $f(T)$ gravity, as well as from the nonminimal curvature-matter-coupled theory. The cosmological application of this new theory proves to be very interesting. In particular, we obtain an effective dark energy sector whose equation-of-state parameter can be quintessence- or phantom-like, or exhibit the phantom-divide crossing, while for a large range of the model parameters the universe enters in a de Sitter, dark-energy-dominated, accelerating phase. Additionally, we can obtain early-time inflationary solutions too, and thus provide a unified description of the cosmological history.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.89.124036

Authors: Tiberiu Harko, Francisco S. N. Lobo, G. Otalora, Emmanuel N. Saridakis

Institutions: University College London, University of Lisbon, Universidade Federal de Juiz de Fora, Pontificia Universidad Católica de Valparaíso, National Technical University of Athens

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green