Quintom model with O($N$) symmetry
| dc.creator | Setare, M. R. | |
| dc.creator | Saridakis, E. N. | |
| dc.date | 2008-08-31 | |
| dc.date.accessioned | 2026-07-07T11:45:41Z | |
| dc.date.available | 2026-07-07T11:45:41Z | |
| dc.description | We investigate the quintom model of dark energy in the generalized case where the corresponding canonical and phantom fields possess O($N$) symmetries. Assuming exponential potentials we find that this O$(N)$ quintom paradigm exhibits novel properties comparing to the simple canonical and phantom scenarios. In particular, we find that the universe cannot result in a quintessence-type solution with $w>-1$, even in the cases where the phantom field seems to be irrelevant. On the contrary, there are always late-time attractors which correspond to accelerating universes with $w<-1$ and with a recent crossing of the phantom divide, and for a very large area of the parameter space they are the only ones. This is in contrast with the previous simple-quintom results, where an accelerating universe is a possible late-time stable solution but it is not guaranteed. | |
| dc.description | 13 pages, no figure | |
| dc.identifier | https://arxiv.org/abs/0809.0114 | |
| dc.identifier | http://arxiv.org/abs/0809.0114 | |
| dc.identifier | JCAP0809:026,2008 | |
| dc.identifier | doi:10.1088/1475-7516/2008/09/026 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/201965 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Quintom model with O($N$) symmetry | |
| dc.type | text |