One-loop corrections to the power spectrum in general single-field inflation

被引：22

作者：

Bartolo, Nicola ^{[1
,2
]}

Dimastrogiovanni, Emanuela ^{[1
,2
]}

Vallinotto, Alberto ^{[3
]}

机构：

[1] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy

[2] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[3] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2010年 / 11期

关键词：

inflation; cosmological perturbation theory; physics of the early universe; COSMOLOGICAL CORRELATIONS; QUANTUM CONTRIBUTIONS; NON-GAUSSIANITY; PERTURBATIONS; SKY;

D O I：

10.1088/1475-7516/2010/11/003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perfom a thorough computation of the one-loop corrections from both scalar and tensor degrees of freedom to the power spectrum of curvature fluctuations for non-canonical Lagrangians in single-field inflation. We consider models characterized by a small sound speed c(s), which produce large non-Gaussianities. As expected, the corrections turn out to be inversely proportional to powers of cs; evaluating their amplitudes it is then possible to derive some theoretical bounds on the sound speed by requesting the conditions necessary for perturbation theory to hold.

引用

页数：40

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