Singularities in Inflationary Cosmological Models
Due to the accelerated expansion of the universe, the possibilities for the formation of singularities has changed from the classical Big Bang and Big Crunch singularities to include a number of new scenarios. In recent papers it has been shown that such singularities may appear in inflationary cosm...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/7/12/491 |
| _version_ | 1797500077143490560 |
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| author | Leonardo Fernández-Jambrina |
| author_facet | Leonardo Fernández-Jambrina |
| author_sort | Leonardo Fernández-Jambrina |
| collection | DOAJ |
| description | Due to the accelerated expansion of the universe, the possibilities for the formation of singularities has changed from the classical Big Bang and Big Crunch singularities to include a number of new scenarios. In recent papers it has been shown that such singularities may appear in inflationary cosmological models with a fractional power scalar field potential. In this paper we enlarge the analysis of singularities in scalar field cosmological models by the use of generalised power expansions of their Hubble scalars and their scalar fields in order to describe all possible models leading to a singularity, finding other possible cases. Unless a negative scalar field potential is considered, all singularities are weak and of type IV. |
| first_indexed | 2024-03-10T03:56:40Z |
| format | Article |
| id | doaj.art-02d2f5dd7e3f4f2789e191ca57abfe93 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-10T03:56:40Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-02d2f5dd7e3f4f2789e191ca57abfe932023-11-23T10:52:43ZengMDPI AGUniverse2218-19972021-12-0171249110.3390/universe7120491Singularities in Inflationary Cosmological ModelsLeonardo Fernández-Jambrina0Matemática e Informática Aplicadas, E.T.S.I. Navales, Universidad Politécnica de Madrid, Avenida de la Memoria 4, E-28040 Madrid, SpainDue to the accelerated expansion of the universe, the possibilities for the formation of singularities has changed from the classical Big Bang and Big Crunch singularities to include a number of new scenarios. In recent papers it has been shown that such singularities may appear in inflationary cosmological models with a fractional power scalar field potential. In this paper we enlarge the analysis of singularities in scalar field cosmological models by the use of generalised power expansions of their Hubble scalars and their scalar fields in order to describe all possible models leading to a singularity, finding other possible cases. Unless a negative scalar field potential is considered, all singularities are weak and of type IV.https://www.mdpi.com/2218-1997/7/12/491singularitycosmologyinflation |
| spellingShingle | Leonardo Fernández-Jambrina Singularities in Inflationary Cosmological Models Universe singularity cosmology inflation |
| title | Singularities in Inflationary Cosmological Models |
| title_full | Singularities in Inflationary Cosmological Models |
| title_fullStr | Singularities in Inflationary Cosmological Models |
| title_full_unstemmed | Singularities in Inflationary Cosmological Models |
| title_short | Singularities in Inflationary Cosmological Models |
| title_sort | singularities in inflationary cosmological models |
| topic | singularity cosmology inflation |
| url | https://www.mdpi.com/2218-1997/7/12/491 |
| work_keys_str_mv | AT leonardofernandezjambrina singularitiesininflationarycosmologicalmodels |