Gravitational collapse of a fluid with torsion into a universe in a black hole
| Autor: | Popławski, Nikodem |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Zh. Eksp. Teor. Fiz. 159, 448 (2021); J. Exp. Theor. Phys. 132, 374 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.31857/S0044451021030068 |
| Popis: | We consider gravitational collapse of a spherically symmetric sphere of a fluid with spin and torsion into a black hole. We use the Tolman metric and the Einstein--Cartan field equations with a relativistic spin fluid as a source. We show that gravitational repulsion of torsion prevents a singularity and replaces it with a nonsingular bounce. Quantum particle production during contraction helps torsion to dominate over shear. Particle production during expansion can generate a finite period of inflation and produce enormous amounts of matter. The resulting closed universe on the other side of the event horizon may have several bounces. Such a universe is oscillatory, with each cycle larger in size then the previous cycle, until it reaches the cosmological size and expands indefinitely. Our universe might have therefore originated from a black hole. Comment: 6 pages. arXiv admin note: substantial text overlap with arXiv:2007.11556 |
| Databáze: | arXiv |
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