The Swampland Conjectures and Slow-Roll Thawing Quintessence

TL;DR

This paper investigates how the Swampland conjectures constrain slow-roll thawing quintessence models, identifying parameter regions compatible with observations and conjectures, and analyzing the fine-tuning required.

Contribution

It provides a detailed analysis of parameter space in thawing quintessence models consistent with Swampland conjectures and observational data, including fine-tuning considerations.

Findings

Identifies parameter regions satisfying observational data and the refined de Sitter conjecture.

Shows all such models comply with the distance conjecture.

Quantifies fine-tuning of λ needed for model viability.

Abstract

We examine the Swampland conjectures in the context of generic slow-roll thawing quintessence models. Defining $\lambda \equiv |V^{\prime}(\phi_i)/V(\phi_i)|$ and $K \equiv \sqrt{1 - 4V^{\prime \prime}(\phi_i)/3V(\phi_i)}$, where $\phi_i$ is the initial value of $\phi$, we find regions of parameter space consistent with both observational data and with the refined de Sitter conjecture, and we show that all such models satisfy the distance conjecture. We quantify the degree of fine-tuning on $\lambda$ needed to achieve these results.