Exploring the Parameter Space of Inflation Model on the Brane and its Compatibility with the Swampland Conjectures

TL;DR

This paper investigates inverse monomial inflation on the brane, analyzing its compatibility with various swampland conjectures, and finds specific parameter regions where the model aligns with these theoretical constraints, suggesting its potential viability as a realistic inflation model.

Contribution

It introduces a detailed analysis of inverse monomial inflation on the brane, assessing its compatibility with multiple swampland conjectures, and identifies parameter regions where the model is consistent with these constraints.

Findings

Model is incompatible with the de Sitter swampland conjecture.

Model satisfies the refined de Sitter swampland conjecture in specific parameter regions.

Model is compatible with scalar weak gravity and strong scalar weak gravity conjectures under certain conditions.

Abstract

In recent years, inflationary models have been studied from different perspectives using different conditions. Now, in this paper, we want to investigate the inverse monomial Inflation $(IMI)$ on the brane. We limit our results to the potentials of the form $\frac{M^{4+\sigma}}{\phi^{\sigma}}$. We calculate some cosmological parameters and then we investigate the satisfaction of the model with some conjectures of the swampland program. We will check the model's compatibility with the refined dS swampland conjecture(RDSSC), further refining the de Sitter swampland conjecture (FRSDC), scalar weak gravity (SWGC), and strong scalar weak gravity conjecture (SSWGC). Despite the incompatibility with (DSSC), We find a specific region of compatibility with other ones which means it satisfied the (FRDSSC) for example with (a=0.982873, b=0.017127, q=2.2). Also, the model is compatible with the (SWGC) with the ($\phi\leq \sigma+2$) condition and consistent with the (SSWGC) with the ($\phi \leq \sqrt{(\sigma+2)(\sigma+1)}$) condition. Since inverse monomial Inflation(IMI) on the brane could satisfy some swampland conjecture simultaneously, it has the potential to be a "real" inflation model of the universe.