English

Bounce Models within Teleparallel modified gravity

General Relativity and Quantum Cosmology 2021-01-20 v2

Abstract

In this paper, working in a Friedman-Lemaitre-Robertson-Walker (FLRW), first, in the flat case, we recover the generalized Friedman equation of Quantum Loop cosmology, and therefore the cosmological bounce, in the framework of modified teleparallel gravity f(T)f(T)-model, TT being the torsion scalar introduced in teleparallel gravity approach, without invoking unconventional exotic matter. Furthermore we study the associated perturbations again in a flat FLRW space-time. Then, we generalize the results to the curved FLRW space-time, where some issues related to the choice of tetrad exist, by using an appropriate formulation. In this context, the results of Born-Infeld model are also investigated.

Keywords

Cite

@article{arxiv.2010.07609,
  title  = {Bounce Models within Teleparallel modified gravity},
  author = {Alessandro Casalino and Bruno Sanna and Lorenzo Sebastiani and Sergio Zerbini},
  journal= {arXiv preprint arXiv:2010.07609},
  year   = {2021}
}

Comments

13 pages, version accepted for publication on PRD

R2 v1 2026-06-23T19:22:09.377Z