Low-Energy String Theory Predicts Black Holes Hide a New Universe

TL;DR

This paper introduces a model where adding an S-brane inside a black hole's horizon resolves singularities and suggests the black hole's interior can evolve into a new universe, addressing key cosmological and information paradoxes.

Contribution

It presents a novel approach using an S-brane to resolve black hole and cosmological singularities and proposes the black hole interior as a new universe.

Findings

Black hole singularity is resolved by the S-brane.

The model allows the black hole interior to evolve into a new universe.

Addresses the information loss paradox through entanglement with the new universe.

Abstract

We propose a construction with which to resolve the black hole singularity and enable an anisotropic cosmology to emerge from the inside of the hole. The model relies on the addition of an S-brane to the effective action which describes the geometry of space-time. This space-like defect is located inside of the horizon on a surface where the Weyl curvature reaches a limiting value. We study how metric fluctuations evolve from the outside of the black hole to the beginning of the cosmological phase to the future of the S-brane. Our setup addresses i) the black hole singularity problem, ii) the cosmological singularity problem and iii) the information loss paradox since the outgoing Hawking radiation is entangled with the state inside the black hole which becomes the new universe.