New no-go theorems for cosmic acceleration with extra dimensions
| dc.creator | Wesley, Daniel H. | |
| dc.date | 2008-02-14 | |
| dc.date | 2008-08-04 | |
| dc.date.accessioned | 2026-07-07T09:54:08Z | |
| dc.date.available | 2026-07-07T09:54:08Z | |
| dc.description | We describe new no-go theorems for producing four-dimensional accelerating universes from warped dimensional reduction. The new theorems improve upon previous results by including dynamical extra dimensions and by treating four-dimensional universes that are not precisely de Sitter. The theorems show there exists a threshold four-dimensional equation-of-state parameter w below which the number of e-foldings of expansion is bounded, and give expressions for the maximum number of allowed e-foldings. In the generic case, the bound must be satisfied if the higher-dimensional theory satisfies the strong energy condition. If the compactification manifold M is one-dimensional, or if its (intrinsic) Ricci scalar R is identically zero, then the bound must be satisfied if the higher-dimensional theory satisfies the null energy condition. | |
| dc.description | v1: 4pp v2: references added v3: minor typo in (12a,b) corrected v4: minor corrections v5: re-organized | |
| dc.identifier | https://arxiv.org/abs/0802.2106 | |
| dc.identifier | http://arxiv.org/abs/0802.2106 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/166205 | |
| dc.subject | High Energy Physics - Theory | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | New no-go theorems for cosmic acceleration with extra dimensions | |
| dc.type | text |