Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8141846 | Physics of the Dark Universe | 2018 | 13 Pages |
Abstract
Recently, it was formulated a teleparallel theory called f(T,B) gravity which connects both f(T) and f(R) under suitable limits. In this theory, the function in the action is assumed to depend on the torsion scalar T and also on a boundary term related with the divergence of torsion, B=2âμTμ. In this work, we study different features of a flat Friedmann-Lemaître-Robertson-Walker (FLRW) cosmology in this theory. First, we show that the FLRW equations can be transformed to the form of Clausius relation TËhSeff=âdE+WdV, where TËh is the horizon temperature and Seff is the entropy which contains contributions both from horizon entropy and an additional entropy term introduced due to the non-equilibrium. We also formulate the constraint for the validity of the generalised second law of thermodynamics (GSLT). Additionally, using a cosmological reconstruction technique, we show that both f(T,B) and âT+F(B) gravity can mimic power-law, de-Sitter and ÎCDM models. Finally, we formulate the perturbed evolution equations and analyse the stability of some important cosmological solutions.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Astronomy and Astrophysics
Authors
Sebastian Bahamonde, M. Zubair, G. Abbas,