Hilltop Quintessence
| dc.creator | Dutta, Sourish | |
| dc.creator | Scherrer, Robert J. | |
| dc.date | 2008-09-25 | |
| dc.date | 2008-12-17 | |
| dc.date.accessioned | 2026-07-07T12:23:20Z | |
| dc.date.available | 2026-07-07T12:23:20Z | |
| dc.description | We examine hilltop quintessence models, in which the scalar field is rolling near a local maximum in the potential, and w is close to -1. We first derive a general equation for the evolution of the scalar field in the limit where w is close to -1. We solve this equation for the case of hilltop quintessence to derive w as a function of the scale factor; these solutions depend on the curvature of the potential near its maximum. Our general result is in excellent agreement (delta w < 0.5%) with all of the particular cases examined. It works particularly well (delta w < 0.1%) for the pseudo-Nambu-Goldstone Boson potential. Our expression for w(a) reduces to the previously-derived slow-roll result of Sen and Scherrer in the limit where the curvature goes to zero. Except for this limiting case, w(a) is poorly fit by linear evolution in a. | |
| dc.description | 7 pages, 9 figures, label on Fig. 4 corrected | |
| dc.identifier | https://arxiv.org/abs/0809.4441 | |
| dc.identifier | http://arxiv.org/abs/0809.4441 | |
| dc.identifier | Phys.Rev.D78:123525,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.123525 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/213949 | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Hilltop Quintessence | |
| dc.type | text |