Regularized big bang singularity: Geodesic congruences
arXiv:2109.04229 · doi:10.1103/PhysRevD.104.084093
Abstract
We investigate a particular regularization of big bang singularity, which remains within the domain of 4-dimensional general relativity but allowing for degenerate metrics. We study the geodesics and geodesic congruences in the modified Friedmann-Lemaître-Robertson-Walker universe. In particular, we calculate the expansion of timelike and null geodesic congruences. Based on these results, we also briefly discuss the cosmological singularity theorems.
arXiv comment16 pages, 1 figure, published version
References in corpus (14)
- A Large-N Reduced Model as Superstring
- Bouncing Cosmologies: Progress and Problems
- CPT-Symmetric Universe
- IIB Matrix Model
- Nonsingular bouncing cosmology in general relativity: physical analysis of the spacetime defect
- Regularized big bang singularity
- Nonsingular bouncing cosmology from general relativity
- More on the regularized big bang singularity
- Nonsingular bouncing cosmology from general relativity: Scalar metric perturbations
- M-theory and the birth of the Universe
- On a soliton-type spacetime defect
- IIB matrix model and regularized big bang
- Lensing and imaging by a stealth defect of spacetime
- Asymmetric nonsingular bounce from a dynamic scalar field