Pseudo-redundant vacuum energy
| dc.creator | Batra, Puneet | |
| dc.creator | Hinterbichler, Kurt | |
| dc.creator | Hui, Lam | |
| dc.creator | Kabat, Daniel | |
| dc.date | 2008-01-29 | |
| dc.date | 2008-08-26 | |
| dc.date.accessioned | 2026-07-07T11:55:41Z | |
| dc.date.available | 2026-07-07T11:55:41Z | |
| dc.description | We discuss models that can account for today's dark energy. The underlying cosmological constant may be Planck scale but starts as a redundant coupling which can be eliminated by a field redefinition. The observed vacuum energy arises when the redundancy is explicitly broken, say by a non-minimal coupling to curvature. We give a recipe for constructing models, including R + 1/R type models, that realize this mechanism and satisfy all solar system constraints on gravity. A similar model, based on Gauss-Bonnet gravity, provides a technically natural explanation for dark energy and exhibits an interesting see-saw behavior: a large underlying cosmological constant gives rise to both low and high curvature solutions. Such models could be statistically favored in the string landscape. | |
| dc.description | 39 pages. Appendix added. Version to appear in Phys. Rev. D | |
| dc.identifier | https://arxiv.org/abs/0801.4526 | |
| dc.identifier | http://arxiv.org/abs/0801.4526 | |
| dc.identifier | Phys.Rev.D78:043507,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.043507 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205326 | |
| dc.subject | High Energy Physics - Theory | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Pseudo-redundant vacuum energy | |
| dc.type | text |