Early and late time cosmology: the f(R) gravity perspective
| Autor: | Francesco Bajardi, Rocco D’Agostino, Micol Benetti, Vittorio De Falco, Salvatore Capozziello |
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| Přispěvatelé: | Bajardi, Francesco, D’Agostino, Rocco, Benetti, Micol, De Falco, Vittorio, Capozziello, Salvatore |
| Rok vydání: | 2022 |
| Předmět: |
High Energy Physics - Theory
Fluid Flow and Transfer Processes Cosmology and Nongalactic Astrophysics (astro-ph.CO) High Energy Physics - Theory (hep-th) FOS: Physical sciences General Physics and Astronomy General Relativity and Quantum Cosmology (gr-qc) General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | Discrepancies between observations at early and late cosmic epochs, and the vacuum energy problem associated with the interpretation of cosmological constant, are questioning the $\Lambda$CDM model. Motivated by these conceptual and observational facts, extensions of Einstein's gravity are recently intensively considered in view of curing unsolved issues suffered by General Relativity at ultraviolet and infrared scales. Here, we provide a short overview of some aspects of $f(R)$ gravity, focusing, in particular, on cosmological applications. Specifically, Noether symmetries are adopted as a criterion to select viable models and investigate the corresponding dynamics. We thus find solutions to the cosmological field equations, analyzing the behaviour of selected models from the matter-dominated to the present epoch. Moreover, constraints coming from energy conditions and the so-called swampland criteria are also considered. In particular, we qualitatively discuss the possibility of $f(R)$ gravity to account for fixing cosmic tensions. Comment: 11 pages, 1 figure, Accepted for publication in EPJP |
| Databáze: | OpenAIRE |
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