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
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.
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页数:40
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