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

被引：486

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.

引用

页数：4

共 43 条

[1] Ghost inflation [J].

Arkani-Hamed, N ;

Creminelli, P ;

Mukohyama, S ;

Zaldarriaga, M .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2004, (04) :1-18

[2] Non-Gaussianity in the curvaton scenario [J].

Bartolo, N ;

Matarrese, S ;

Riotto, A .

PHYSICAL REVIEW D, 2004, 69 (04)

[3] Non-Gaussianity of large-scale cosmic microwave background anisotropies beyond perturbation theory [J].

Bartolo, N ;

Matarrese, S ;

Riotto, A .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2005, (08) :177-196

[4]

BOUBEKUER L, ASTROPH0504046

[5] QUANTUM FIELD-THEORY IN DE SITTER SPACE - RENORMALIZATION BY POINT-SPLITTING [J].

BUNCH, TS ;

DAVIES, PCW .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1978, 360 (1700) :117-134

[6] A single-field consistency relation for the three-point function [J].

Creminelli, P ;

Zaldarriaga, M .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2004, (10) :101-107

[7]

ENGVIST K, 2004, J COSMOL ASTROPART P, P6

[8]

ENQUIST K, 2002, NUCL PHYS B, V626, P395

[9] Angular trispectrum of the cosmic microwave background [J].

Hu, W .

PHYSICAL REVIEW D, 2001, 64 (08)

[10]

Kadota K, 2003, J HIGH ENERGY PHYS

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