Big Bang as spacetime defect
General Relativity and Quantum Cosmology
2025-08-26 v5 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We review the suggestion that it is possible to eliminate the Big Bang curvature singularity of the Friedmann cosmological solution by considering a particular type of degenerate spacetime metric. Specifically, we take the 4-dimensional spacetime metric to have a spacelike 3-dimensional defect with a vanishing determinant of the metric. This new solution suggests the existence of another "side" of the Big Bang (perhaps a more appropriate description than "pre-Big-Bang" phase used in our original paper). The corresponding new solution for defect wormholes is also briefly discussed.
Cite
@article{arxiv.2412.03538,
title = {Big Bang as spacetime defect},
author = {F. R. Klinkhamer},
journal= {arXiv preprint arXiv:2412.03538},
year = {2025}
}
Comments
invited review paper, v5: published version (here, with expanded references)