Bounce models within teleparallel modified gravity

In this paper, working in a Friedman-Lemaitre-Robertson-Walker (FLRW) space-time, we recover, without invoking unconventional exotic matter, the generalized Friedman equation of quantum loop cosmology, and therefore the cosmological bounce. We obtain this result proposing a new model in the framewor...

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Veröffentlicht in:Physical review. D 2021-01, Vol.103 (2), p.1, Article 023514
Hauptverfasser: Casalino, Alessandro, Sanna, Bruno, Sebastiani, Lorenzo, Zerbini, Sergio
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Sprache:eng
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Zusammenfassung:In this paper, working in a Friedman-Lemaitre-Robertson-Walker (FLRW) space-time, we recover, without invoking unconventional exotic matter, the generalized Friedman equation of quantum loop cosmology, and therefore the cosmological bounce. We obtain this result proposing a new model in the framework of modified teleparallel gravity, where the Ricci scalar is replaced by the torsion scalar T. Furthermore we show that the associated perturbations again in a flat FLRW space-time are not affected by superluminarities or gradient instabilities. Then, we generalize the results to the curved FLRW space-time by using an appropriate formulation. In this context, the results of the Born-Infeld model are also investigated.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.103.023514