Special Issue on Modified Gravity Approaches to the Tensions of $\Lambda$CDM: Goals and Highlights

TL;DR

This special issue explores how Modified Gravity theories can address key tensions in the $\\Lambda$CDM model, combining theoretical insights and observational data to improve our understanding of the universe.

Contribution

It compiles recent theoretical and empirical research on Modified Gravity approaches as potential solutions to $\\Lambda$CDM model discrepancies.

Findings

Modified Gravity models can potentially resolve Hubble constant tensions

Empirical evidence supports alternative gravity theories at cosmological scales

Theoretical frameworks extend beyond standard General Relativity

Abstract

The Special Issue on "Modified Gravity Approaches to the Tensions of $\Lambda$CDM"} in the Universe journal tackles significant challenges faced by the $\Lambda$CDM model, including discrepancies in the Hubble constant, growth rate of structures, and cosmological anisotropies. These issues suggest foundational cracks in the model, raising questions about the validity of General Relativity, dark energy, and cosmological principles at large scales. This collection brings together leading researchers to delve into Modified Gravity theories as potential solutions. Covering approaches from Scalar-Tensor theories to $f(R,T)$ gravity and beyond, each contribution presents innovative research aimed at addressing the limitations of the $\Lambda$CDM model. This Special Issue not only highlights the theoretical and empirical strengths of Modified Gravity models but also opens avenues for future investigations, emphasizing the synergy between theoretical advancements and observational evidence to deepen our cosmological understanding.