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Bounce Models within Teleparallel modified gravity

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arxiv 2010.07609 v2 pith:LUE5J77V submitted 2020-10-15 gr-qc

Alessandro Casalino , Bruno Sanna , Lorenzo Sebastiani , Sergio Zerbini This is my paper · ORCID
classification gr-qc
keywords flrwgravityteleparallelbounceflatmodelmodifiedresults
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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 $f(T)$-model, $T$ 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.

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Cited by 1 Pith paper

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  1. Properties of compact objects in quadratic non-metricity gravity

    gr-qc 2025-07 reject novelty 4.0 of 10

    Quadratic non-metricity gravity with a fitted coupling ξ can match PSR J0740+6620 while keeping the radial sound speed below c²/3, according to the paper's chosen metric ansatz.

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