Adiabatic And Entropy Perturations In Inflationary Models Based On Non-linear Sigma Model
| dc.creator | Koshelev, N. A. | |
| dc.date | 2005-01-27 | |
| dc.date.accessioned | 2026-07-07T02:16:52Z | |
| dc.date.available | 2026-07-07T02:16:52Z | |
| dc.description | The scalar perturbations in inflationary models, based on a two-component diagonal non-linear sigma model, are considered. For inhomogeneities generated at an inflationary stage, the law of motion of the comoving curvature ${\cal R}$ is obtained (without using the slow roll approximations). A formal expressions for the power spectrum and its spectral index are obtained, which are valid and after the slow-roll stage. As an example, an inflationary model with a massive scalar field and quadratic curvature corrections is studied numerically. | |
| dc.description | 6 pages, 2 Postscript figures, accepted for publications by Grav.& Cosmol | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0501600 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0501600 | |
| dc.identifier | Grav.Cosmol. 10 (2004) 289-294 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/8958 | |
| dc.subject | Astrophysics | |
| dc.title | Adiabatic And Entropy Perturations In Inflationary Models Based On Non-linear Sigma Model | |
| dc.type | text |