Bahamonde, S;
Zubair, M;
Abbas, G;
(2018)
Thermodynamics and Cosmological Reconstruction in Gravity.
Physics of the Dark Universe
, 19
pp. 78-90.
10.1016/j.dark.2017.12.005.
Preview |
Text
thermofTrevisedPhDEv3.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Recently, it was formulated a teleparallel theory called gravity which connects both and under suitable limits. In this theory, the function in the action is assumed to depend on the torsion scalar and also on a boundary term related with the divergence of torsion, . 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 , where is the horizon temperature and 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 and gravity can mimic power-law, de-Sitter and CDM models. Finally, we formulate the perturbed evolution equations and analyse the stability of some important cosmological solutions.
Type: | Article |
---|---|
Title: | Thermodynamics and Cosmological Reconstruction in Gravity |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1016/j.dark.2017.12.005 |
Publisher version: | https://doi.org/10.1016/j.dark.2017.12.005 |
Language: | English |
Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | Teleparallel gravity, gravity, Cosmology, CDM universe, Thermodynamic laws |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10059332 |
Archive Staff Only
![]() |
View Item |