Scale-invariant perturbations from chaotic inflation

被引：20

作者：

Byrnes, CT ^{[1
]}

Wands, D ^{[1
]}

机构：

[1] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 2EG, Hants, England

来源：

PHYSICAL REVIEW D | 2006年 / 73卷 / 06期

关键词：

D O I：

10.1103/PhysRevD.73.063509

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Vacuum fluctuations in the inflaton field driving chaotic inflation with a quadratic potential give a red spectrum of primordial density perturbations, n=0.97. However angular fluctuations in an O(N)-symmetric quadratic potential have a very nearly scale-invariant spectrum, n=0.9998. We investigate the possibility that these isocurvature field perturbations could give the dominant contribution to the primordial density perturbation after inflation.

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