From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems
Decaying vacuum cosmological models evolving smoothly between two extreme (very early and late time) de Sitter phases are able to solve or at least to alleviate some cosmological puzzles; among them we have (i) the singularity, (ii) horizon, (iii) graceful-exit from inflation, and (iv) the baryogene...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2018/6980486 |
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| author | G. J. M. Zilioti R. C. Santos J. A. S. Lima |
| author_facet | G. J. M. Zilioti R. C. Santos J. A. S. Lima |
| author_sort | G. J. M. Zilioti |
| collection | DOAJ |
| description | Decaying vacuum cosmological models evolving smoothly between two extreme (very early and late time) de Sitter phases are able to solve or at least to alleviate some cosmological puzzles; among them we have (i) the singularity, (ii) horizon, (iii) graceful-exit from inflation, and (iv) the baryogenesis problem. Our basic aim here is to discuss how the coincidence problem based on a large class of running vacuum cosmologies evolving from de Sitter to de Sitter can also be mollified. It is also argued that even the cosmological constant problem becomes less severe provided that the characteristic scales of the two limiting de Sitter manifolds are predicted from first principles. |
| format | Article |
| id | doaj-art-e04101edf74b4ea8b3204844112974f6 |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-e04101edf74b4ea8b3204844112974f62025-02-03T01:21:17ZengWileyAdvances in High Energy Physics1687-73571687-73652018-01-01201810.1155/2018/69804866980486From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological ProblemsG. J. M. Zilioti0R. C. Santos1J. A. S. Lima2Universidade Federal do ABC (UFABC), Santo André, 09210-580 São Paulo, BrazilDepartamento de Física, Universidade Federal de São Paulo (UNIFESP), 09972-270 Diadema, SP, BrazilDepartamento de Astronomia, Universidade de São Paulo (IAGUSP), Rua do Matão 1226, 05508-900 São Paulo, BrazilDecaying vacuum cosmological models evolving smoothly between two extreme (very early and late time) de Sitter phases are able to solve or at least to alleviate some cosmological puzzles; among them we have (i) the singularity, (ii) horizon, (iii) graceful-exit from inflation, and (iv) the baryogenesis problem. Our basic aim here is to discuss how the coincidence problem based on a large class of running vacuum cosmologies evolving from de Sitter to de Sitter can also be mollified. It is also argued that even the cosmological constant problem becomes less severe provided that the characteristic scales of the two limiting de Sitter manifolds are predicted from first principles.http://dx.doi.org/10.1155/2018/6980486 |
| spellingShingle | G. J. M. Zilioti R. C. Santos J. A. S. Lima From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems Advances in High Energy Physics |
| title | From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems |
| title_full | From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems |
| title_fullStr | From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems |
| title_full_unstemmed | From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems |
| title_short | From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems |
| title_sort | from de sitter to de sitter decaying vacuum models as a possible solution to the main cosmological problems |
| url | http://dx.doi.org/10.1155/2018/6980486 |
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