The universe as a closed anisotropic universe born in a black hole

Autor:	Popławski, Nikodem
Rok vydání:	2020
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj:	Gen. Relativ. Gravit. 53, 18 (2021)
Druh dokumentu:	Working Paper
DOI:	10.1007/s10714-021-02790-7
Popis:	We consider a universe formed in a black hole in the Einstein--Cartan theory of gravity. The interior of a Schwarzschild black hole can be represented by the Kantowski--Sachs metric that describes a closed anisotropic universe. We use this metric to derive the field equations with a relativistic spin fluid as a source. We show that torsion may prevent a singularity and replace it with a nonsingular bounce if particle production dominates over shear. Particle production after the last bounce can generate a finite period of inflation, during which the universe expands and isotropizes to the currently observed state. Our universe might have therefore originated from a black hole. Comment: 6 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2007.11556 Zobrazit plný text záznamu View this record from Arxiv