Resolving Hubble tension with the Milne model

TL;DR

This paper demonstrates that the Milne model, a non-conventional cosmological theory, can significantly alleviate the Hubble tension and address several fundamental issues of standard cosmology.

Contribution

It shows that the Milne model offers a viable alternative to $\Lambda$CDM, resolving the Hubble tension and solving key cosmological problems.

Findings

Milne model reduces the Hubble tension effectively.

The model addresses the cosmological constant and horizon problems.

It avoids the Big Bang singularity and age issues.

Abstract

The recent measurements of the Hubble constant based on the standard $\Lambda$CDM cosmology reveal an underlying disagreement between the early-Universe estimates and the late-time measurements. Moreover, as these measurements improve, the discrepancy not only persists but becomes even more significant and harder to ignore. The present situation places the standard cosmology in jeopardy and provides a tantalizing hint that the problem results from some new physics beyond the $\Lambda$CDM model. It is shown that a non-conventional theory - the Milne model - which introduces a different evolution dynamics for the Universe, alleviates the Hubble tension significantly. Moreover, the model also averts some long-standing problems of the standard cosmology, for instance, the problems related with the cosmological constant, the horizon, the flatness, the Big Bang singularity, the age of the Universe and the non-conservation of energy.