Trapped inflation

被引：124
作者：
Green, Daniel [1 ,2 ]
Horn, Bart [1 ,2 ]
Senatore, Leonardo [3 ,4 ,5 ]
Silverstein, Eva [1 ,2 ]
机构：
[1] Stanford Univ, SLAC, Stanford, CA 94305 USA
[2] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[3] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA
[4] Harvard Univ, Jefferson Phys Lab, Cambridge, MA 02138 USA
[5] Harvard Univ, Ctr Astrophys, Cambridge, MA 02138 USA
来源：
PHYSICAL REVIEW D | 2009年 / 80卷 / 06期
基金：
加拿大自然科学与工程研究理事会; 美国国家科学基金会;
关键词：
PROBE WMAP OBSERVATIONS; DENSITY PERTURBATIONS; UNIVERSE; FLATNESS; HORIZON;
D O I：
10.1103/PhysRevD.80.063533
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We analyze a distinctive mechanism for inflation in which particle production slows down a scalar field on a steep potential and show how it descends from angular moduli in string compactifications. The analysis of density perturbations-taking into account the integrated effect of the produced particles and their quantum fluctuations-requires somewhat new techniques that we develop. We then determine the conditions for this effect to produce 60 e-foldings of inflation with the correct amplitude of density perturbations at the Gaussian level and show that these requirements can be straightforwardly satisfied. Finally, we estimate the amplitude of the non-Gaussianity in the power spectrum and find a significant equilateral contribution.
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页数：16
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