| Autor: |
Ismael Ayuso, José P. Mimoso, Nelson J. Nunes |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Galaxies, Vol 7, Iss 1, p 38 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2075-4434 |
| DOI: |
10.3390/galaxies7010038 |
| Popis: |
In this work, we seek a cosmological mechanism that may define the sign of the effective gravitational coupling constant, G. To this end, we consider general scalar-tensor gravity theories as they provide the field theory natural framework for the variation of the gravitational coupling. We find that models with a quadratic potential naturally stabilize the value of G into the positive branch of the evolution and further, that de Sitter inflation and a relaxation to General Relativity is easily attained. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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