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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页数：8
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