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Jafar Sadeghi

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address:
Phone: 9111125092

Research

Title
Investigating the logarithmic form of f(R) gravity model from brane perspective and swampland criteria
Type
JournalPaper
Keywords
Inflation model; logarithmic f (R); swampland criteria; modified cosmological parameters; weak gravity conjecture
Year
2021
Journal Pramana - Journal of Physics
DOI
Researchers Jafar Sadeghi ، saeed noori gashti

Abstract

As we know, the inflation models have been considered by researchers in various fields of physics such as cosmology and particle physics for explaining early Universe. According to different conditions and conjectures, there are several types of inflation models. In this article, we want to examine a new condition for the inflation models which is known as the swampland criterion. Therefore, we consider f (R) model that includes a polynomial plus a logarithmic term as R + αR2 + βRn + γ R2 log γ R. So, by considering the corresponding modified f (R) gravity on the brane, we obtain the modified cosmological parameters such as spectral index, tensor-to-scalar ratio and a number of e-folds. These modified parameters give us the opportunity to test the compatibility of f (R) gravity model with swampland criteria. Finally, by using some figures as well as observable data, we specify the range of modified cosmological parameters.