Cosmic Evolution of the Logarithmic f(R) Model and the dS Swampland Conjecture

In this paper, we study the inflationary scenario in logarithmic f(R) gravity, where the rate of inflation roll is constant. On the other hand, our gravitational f(R) model is a polynomial plus a logarithmic term. We take advantage of constant-roll conditions and investigate the cosmic evolution of...

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Bibliographic Details
Published in:Universe (Basel) 2022-12, Vol.8 (12), p.623
Main Authors: Sadeghi, Jafar, Pourhassan, Behnam, Noori Gashti, Saeed, Naghd Mezerji, Elaheh, Pasqua, Antonio
Format: Article
Language:English
Subjects:
Big Bang theory
Cosmology
Dark energy
Evolution
f(R) gravity
Gravity
inflation
Phase transitions
Physics
Radiation
String theory
swampland conjecture
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Summary:In this paper, we study the inflationary scenario in logarithmic f(R) gravity, where the rate of inflation roll is constant. On the other hand, our gravitational f(R) model is a polynomial plus a logarithmic term. We take advantage of constant-roll conditions and investigate the cosmic evolution of the logarithmic f(R) gravity. We present a numerical and a graphical study using the model parameters. Additionally, we obtain the corresponding potential by using the constant-roll condition. We obtain the exact value of the potential satisfying the constant-roll conditions. Next, we challenge it with refined swampland conjecture with respect to the Planck data. Finally, we compare our results with the latest observable data.
ISSN:2218-1997
2218-1997
DOI:10.3390/universe8120623