Accelerated expansion by non-minimally coupled scalar fields
| dc.creator | Bieli, Roger | |
| dc.date | 2006-12-14 | |
| dc.date | 2009-03-06 | |
| dc.date.accessioned | 2026-07-07T12:49:25Z | |
| dc.date.available | 2026-07-07T12:49:25Z | |
| dc.description | In a class of spatially homogeneous cosmologies including those of Bianchi type I--VIII mathematical results are presented which show that a scalar field non-minimally coupled to the scalar curvature of spacetime can dynamically yield a positive cosmological constant without the potential being required to include one. More precisely, it is shown that in an exponential potential any positive coupling constant leads eventually to late-time de Sitter expansion and isotropization corresponding to a positive cosmological constant and that this behaviour is independent of the steepness of the potential. This is in marked contrast to the minimally coupled case where power-law inflation occurs at most, provided the potential is sufficiently shallow. | |
| dc.description | 3 pages, no figures, published version | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0612382 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0612382 | |
| dc.identifier | Proceedings of the Eleventh Marcel Grossmann Meeting on General Relativity (Berlin, 2006), (Eds.) H. Kleinert, R. T. Jantzen and R. Ruffini, World Sci. Publ. Co., Singapore (2008) 1767-1769 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/222395 | |
| dc.subject | Astrophysics | |
| dc.title | Accelerated expansion by non-minimally coupled scalar fields | |
| dc.type | text |