Constraining the swiss-cheese IR-fixed point cosmology with cosmic expansion

TL;DR

This paper investigates a swiss-cheese cosmology model with an infrared fixed point for the cosmological constant, explaining cosmic acceleration and addressing fine-tuning and coincidence problems.

Contribution

It relaxes previous assumptions by allowing a generic scaling of the cosmological constant around the IR fixed point, aligning with the ΛCDM model.

Findings

IR-running of the cosmological constant is consistent with an IR fixed point.

The model explains cosmic acceleration without dark energy.

Addresses fine-tuning and coincidence problems.

Abstract

In a recent work, it has been proposed that the recent cosmic passage to a cosmic acceleration era is the result of the existence of small anti-gravity sources in each galaxy and clusters of galaxies. In particular, a swiss-cheese cosmology model which relativistically integrates the contribution of all these anti-gravity sources on galactic scale has been constructed assuming the presence of an infrared fixed point for a scale dependent cosmological constant. The derived cosmological expansion provides explanation for both the fine tuning and the coincidence problem. The present work relaxes the previous assumption on the running of the cosmological constant and allows for a generic scaling around the infrared fixed point. Our analysis reveals in order to produce a cosmic evolution consistent with the best $\Lambda$CDM model, the IR-running of the cosmological constant is consistent with the presence of an IR-fixed point.