Some Enigmatic Aspects of the Early Universe II

TL;DR

This paper explores various theoretical mechanisms, including gravitational interactions, charge, spin, temperature-dependent gravity, and modified gravity actions, that could prevent singularities in the early universe.

Contribution

It extends previous work by incorporating charge and spin, and discusses alternative scenarios like variable gravitational constants and modified gravity to avoid singularities.

Findings

Mutual gravitational interactions can prevent singularities.

Charge and spin inclusion offer new singularity avoidance mechanisms.

Modified gravity theories can lead to finite maximal curvature.

Abstract

In a recent paper it was suggested that inclusion of mutual gravitational interactions among the collapsing particles can avert a singularity and give finite value for various physical quantities. In this paper we extend this idea further by the inclusion of charge and spin to the system. We have also discussed other possible scenarios by which the singular state can be averted, including a temperature dependent gravitational constant. Also possible modifications in the Einstein-Hilbert action have been discussed, which can again lead to a finite maximal curvature hence avoiding a singularity.