From de Sitter to de Sitter: Decaying Vacuum Models as a Possible Solution to the Main Cosmological Problems

Autor: G. J. M. Zilioti, R. C. Santos, J. A. S. Lima
Jazyk: angličtina
Rok vydání: 2018
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Zdroj: Advances in High Energy Physics, Vol 2018 (2018)
Druh dokumentu: article
ISSN: 1687-7357
1687-7365
DOI: 10.1155/2018/6980486
Popis: 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.
Databáze: Directory of Open Access Journals
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