2024 : 5 : 28

Jafar Sadeghi

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

Research

Title
Pleasant behavior of swampland conjectures in the face of specific inflationary models
Type
JournalPaper
Keywords
Swampland criteria Cosmological parameters Single-field inflation
Year
2022
Journal ASTROPARTICLE PHYSICS
DOI
Researchers saeed noori gashti ، Jafar Sadeghi ، Behnam Pourhassan

Abstract

Recently researchers have been studying various conditions as swampland criteria in cosmological implications. They have studied many inflation models with different swampland conditions. Occasionally these conjectures are modified and lead to fascinating points. The swampland conjecture is in contradiction with the slow-roll single-field inflation model. So in this paper, we will briefly describe resolving this contradiction with the special method; we consider a small parameter 𝜆 with respect to a coupling function in inflation and resolve this important antithesis. Then we will discuss a new point of view in studying inflation models according to the swampland criteria. Therefore we introduce some inflation models and challenge the swampland criteria. We specify the allowable range of cosmological parameters as the tensor-to-scalar ratio (𝑟), the scalar spectral index (𝑛𝑠 ) according to the latest observable data. Next, we study the new constraints to determine the compatibility or incompatibility of the corresponding model with the swampland conjectures. Finally, we express the results and compare them with the latest observational data by plotting some figures.