| Автор | Aaron C. Vincent |
| Автор | James M. Cline |
| Дата выпуска | 2008-10-01 |
| dc.description | Using the gradient expansion method of Rigopoulos, Shellard and van Tent which treats cosmological perturbations as gradients on top of a homogeneous and isotropic FRW background, we study the production of nongaussianities in the roulette model of inflation. Investigating a number of trajectories within this two-field model of inflation, we find that while the superhorizon influence of the isocurvature modes on the curvature bispectrum produces nonzero contribution to f<sub>NL</sub>, the effect is negligible next to the standard inflationary prediction |f<sub>NL</sub>| ∼ n<sub>s</sub>−1. This is the case in both the squeezed and equilateral configurations of the bispectrum, although the former is slightly larger in the trajectories under consideration. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Curvature spectra and nongaussianities in the roulette inflation model |
| Тип | paper |
| DOI | 10.1088/1126-6708/2008/10/093 |
| Electronic ISSN | 1029- 8479 |
| Print ISSN | 1126-6708 |
| Журнал | Journal of High Energy Physics |
| Том | 2008 |
| Первая страница | 93 |
| Последняя страница | 093 |
| Аффилиация | Aaron C. Vincent; Department of Physics, Rutherford Physics Building, McGill University, 3600 Rue University, Montreal, QC, H3A 2T8, Canada |
| Аффилиация | James M. Cline; Department of Physics, Rutherford Physics Building, McGill University, 3600 Rue University, Montreal, QC, H3A 2T8, Canada |
| Выпуск | 10 |
