Gradient expansion approach to nonlinear superhorizon perturbations II -- a single scalar field --
| dc.creator | Tanaka, Yoshiharu | |
| dc.creator | Sasaki, Misao | |
| dc.date | 2007-06-05 | |
| dc.date | 2007-06-14 | |
| dc.date.accessioned | 2026-07-07T11:16:38Z | |
| dc.date.available | 2026-07-07T11:16:38Z | |
| dc.description | We formulate nonlinear perturbations of a scalar field dominated universe on super-horizon scales. We consider the case of a single scalar field. We take the gradient expansion approach. We adopt the uniform Hubble slicing and derive the general solution valid to $O(ε^2)$, where $ε$ is the expansion parameter associated with a spatial derivative, which includes both the scalar and tensor modes. In particular, the $O(ε^2)$ correction terms to the nonlinear curvature perturbation, which become important in models with a non-slowroll stage during inflation, are explicitly obtained. | |
| dc.description | 13 pages, no figures, typos corrected | |
| dc.identifier | https://arxiv.org/abs/0706.0678 | |
| dc.identifier | http://arxiv.org/abs/0706.0678 | |
| dc.identifier | Prog.Theor.Phys.118:455-473,2007 | |
| dc.identifier | doi:10.1143/PTP.118.455 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/192739 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Gradient expansion approach to nonlinear superhorizon perturbations II -- a single scalar field -- | |
| dc.type | text |