TL;DR
This paper explores the possibility of removing the Big Bang singularity using degenerate spacetime metrics and discusses related concepts like CPT-conjugated worlds and extended Einstein equations.
Contribution
It investigates alternative models of the Big Bang by employing degenerate metrics and extended gravitational equations, offering new theoretical perspectives.
Findings
Proposes elimination of the Big Bang singularity with degenerate metrics
Discusses the potential existence of CPT-conjugated worlds
Considers the relevance of extended Einstein field equations
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.
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