Universe in a black hole with spin and torsion

TL;DR

This paper proposes that black holes with torsion can produce nonsingular universes on their other side, potentially explaining our universe's origin through black hole interiors in a multiverse scenario.

Contribution

It introduces a model where torsion in spacetime prevents singularities and leads to universe creation inside black holes, linking black hole physics with cosmogenesis.

Findings

Black holes with torsion form nonsingular universes.

Quantum particle production can cause exponential expansion in these universes.

Our universe may have originated from a black hole in another universe.

Abstract

The conservation law for the angular momentum in curved spacetime requires that the antisymmetric part of the affine connection (the torsion tensor) is a variable in the principle of least action. The coupling between spin and torsion generates gravitational repulsion in fermionic matter at extremely high densities and avoids the formation of singularities in black holes. We show that every black hole in the presence of torsion forms a nonsingular, closed, nearly flat, homogeneous, and isotropic universe on the other side of its event horizon. Quantum particle production in such a universe can generate a period of exponential expansion which creates an enormous amount of matter in that universe. Accordingly, our Universe may have originated from the interior of a black hole existing in another universe.