Could the dynamics of the Universe be influenced by what is going on inside black holes?

TL;DR

This paper explores how mass inflation inside black holes, under a modified gravity theory, could affect the Universe's dynamics and the cosmological constant, suggesting a potential new paradigm for cosmic evolution.

Contribution

It introduces a reformulation of general relativity that prevents vacuum energy from gravitating and studies black hole interior dynamics to assess their influence on cosmology.

Findings

Mass inflation can alter the cosmological constant.

Black hole interior dynamics may impact Universe evolution.

Modified gravity theory changes vacuum energy effects.

Abstract

We investigate the potential impact of mass inflation inside black holes on the dynamics of the Universe, considering a recent reformulation of general relativity, proposed in [1], which prevents the vacuum energy from acting as a gravitational source. The interior dynamics of accreting black holes is studied, at the classical level, using the homogeneous approximation and taking charge as a surrogate for angular momentum. We show that, depending on the accreting fluid properties, mass inflation inside black holes could influence the value of the cosmological constant and thus the dynamics of the Universe. A full assessment of the cosmological role played by black holes will require a deeper understanding of the extremely energetic regimes expected inside real astrophysical black holes, including their relation with the physics of the very early Universe, and may eventually lead to an entirely new paradigm for the origin and evolution of the Universe.