Inflationary perturbations with multiple scalar fields
| dc.creator | van Tent, B. J. W. | |
| dc.creator | Nibbelink, S. Groot | |
| dc.date | 2001-11-28 | |
| dc.date.accessioned | 2026-07-07T03:45:58Z | |
| dc.date.available | 2026-07-07T03:45:58Z | |
| dc.description | The calculation of scalar gravitational and matter perturbations during multiple-field inflation valid to first order in slow roll is discussed. These fields may be the coordinates of a non-trivial field manifold and hence have non-minimal kinetic terms. A basis for these perturbations determined by the background dynamics is introduced, and the slow-roll functions are generalized to the multiple-field case. Solutions for a perturbation mode in its three different behavioural regimes are combined, leading to an analytic expression for the correlator of the gravitational potential. Multiple-field effects caused by the coupling to the field perturbation perpendicular to the field velocity can even contribute at leading order. This is illustrated numerically with an example of a quadratic potential. (The material here is based on previous work by the authors presented in hep-ph/0107272.) | |
| dc.description | 11 pages, 2 figures. Talk given at COSMO-01 Workshop, Rovaniemi, Finland, August 30 - September 4, 2001 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0111370 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0111370 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/41117 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Inflationary perturbations with multiple scalar fields | |
| dc.type | text |