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 |
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Format: | Artikel |
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. |
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ISSN: | 2470-0010 2470-0029 |
DOI: | 10.1103/PhysRevD.103.023514 |