Inflationary prediction for primordial non-Gaussianity -: art. no. 121302

被引：477
作者：
Lyth, DH [1 ]
Rodríguez, Y
机构：
[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England
[2] Univ Antonio Narino, Ctr Invest, Bogota, Colombia
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 12期
关键词：
D O I：
10.1103/PhysRevLett.95.121302
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We extend the delta N formalism so that it gives all of the stochastic properties of the primordial curvature perturbation zeta if the initial field perturbations are Gaussian. The calculation requires only the knowledge of some family of unperturbed universes. A formula is given for the normalization f(NL) of the bispectrum of zeta, which is the main signal of non-Gaussianity. Examples of the use of the formula are given, and its relation to cosmological perturbation theory is explained.
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