Coupled quintessence and curvature-assisted acceleration
| dc.creator | Bieli, Roger | |
| dc.date | 2006-06-26 | |
| dc.date | 2006-08-31 | |
| dc.date.accessioned | 2026-07-07T07:13:13Z | |
| dc.date.available | 2026-07-07T07:13:13Z | |
| dc.description | Spatially homogeneous models with a scalar field non-minimally coupled to the space-time curvature or to the ordinary matter content are analysed with respect to late-time asymptotic behaviour, in particular to accelerated expansion and isotropization. It is found that a direct coupling to the curvature leads to asymptotic de Sitter expansion in arbitrary exponential potentials, thus yielding a positive cosmological constant although none is apparent in the potential. This holds true regardless of the steepness of the potential or the smallness of the coupling constant. For matter-coupled scalar fields, the asymptotics are obtained for a large class of positive potentials, generalizing the well-known cosmic no-hair theorems for minimal coupling. In this case it is observed that the direct coupling to matter does not impact the late-time dynamics essentially. | |
| dc.description | 17 pages, no figures. v2: typos corrected | |
| dc.identifier | https://arxiv.org/abs/gr-qc/0606113 | |
| dc.identifier | http://arxiv.org/abs/gr-qc/0606113 | |
| dc.identifier | Class.Quant.Grav. 23 (2006) 5983-5995 | |
| dc.identifier | doi:10.1088/0264-9381/23/20/018 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/112371 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | Astrophysics | |
| dc.title | Coupled quintessence and curvature-assisted acceleration | |
| dc.type | text |