Gravitational collapse with torsion and universe in a black hole
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866914164727873536 |
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| author | Popławski, Nikodem |
| author_facet | Popławski, Nikodem |
| contents | We consider gravitational collapse of a fluid sphere with torsion generated by spin, which forms 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, replacing it with a nonsingular bounce. Quantum particle creation during contraction prevents shear from overcoming torsion. Particle creation during expansion can generate a finite period of inflation and produce large 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 than the preceding cycle, until it reaches a size at which dark energy dominates and expands indefinitely. Our Universe might have therefore originated from a black hole existing in another universe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_11468 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gravitational collapse with torsion and universe in a black hole Popławski, Nikodem General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics We consider gravitational collapse of a fluid sphere with torsion generated by spin, which forms 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, replacing it with a nonsingular bounce. Quantum particle creation during contraction prevents shear from overcoming torsion. Particle creation during expansion can generate a finite period of inflation and produce large 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 than the preceding cycle, until it reaches a size at which dark energy dominates and expands indefinitely. Our Universe might have therefore originated from a black hole existing in another universe. |
| title | Gravitational collapse with torsion and universe in a black hole |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2509.11468 |