Big Bang revisited
General Relativity and Quantum Cosmology
2026-04-09 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
The Friedmann cosmological solution of the standard Einstein gravitational field equation has a curvature singularity at a moment in time known as the Big Bang. It has been suggested that this Big Bang curvature singularity can be eliminated by use of a degenerate spacetime metric. This proposal was the main topic of our talk at the Workshop, but, here, we also discuss the possible appearance of CPT-conjugated worlds and the conjectured relevance of an extended version of Einstein's field equation.
Cite
@article{arxiv.2604.00077,
title = {Big Bang revisited},
author = {Frans R. Klinkhamer},
journal= {arXiv preprint arXiv:2604.00077},
year = {2026}
}
Comments
write-up of an invited talk at the "Workshop on Tensions in Cosmology" of the Corfu Summer Institute, September 2-8, 2025; v2: 18 pages, minor changes