Accurate determination of inflationary perturbations

被引：42

作者：

Grivell, IJ

Liddle, AR

机构：

[1] Astronomy Centre, University of Sussex, Falmer

来源：

PHYSICAL REVIEW D | 1996年 / 54卷 / 12期

关键词：

D O I：

10.1103/PhysRevD.54.7191

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use a numerical code for accurate computation of the amplitude of linear density perturbations and gravitational waves generated by single-field inflation models to study the accuracy of existing analytic results based on the slow-roll approximation. We use our code to calculate the coefficient of an expansion about the exact analytic result for power-law inflation; this generates a fitting function which can be applied to all inflationary models to obtain extremely accurate results. In the appropriate limit our results confirm the Stewart-Lyth analytic second-order calculation, and we find that their results are very accurate for inflationary models favored by current observational constraints.

引用

页码：7191 / 7198

页数：8

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