Enhancement of non-Gaussianity after inflation - INSPIRE

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Enhancement of non-Gaussianity after inflation

N. Bartolo
(
- Sussex U., Astron. Ctr.
)
,
Sabino Matarrese
(
- Padua U. and
- INFN, Padua
)
,
A. Riotto
(
- Padua U. and
- INFN, Padua
)

Aug, 2003

12 pages

Published in:

JHEP 04 (2004) 006

e-Print:

astro-ph/0308088 [astro-ph]

DOI:

10.1088/1126-6708/2004/04/006

Report number:

DFPD-A-03-32

View in:

ADS Abstract Service

reference search90 citations

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Abstract: (arXiv)

We study the evolution of cosmological perturbations on large scales, up to second order, for a perfect fluid with generic equation of state. Taking advantage of super-horizon conservation laws, it is possible to follow the evolution of the non-Gaussianity of perturbations through the different stages after inflation. We find that a large non-linearity is generated by the gravitational dynamics from the original inflationary quantum fluctuations. This leads to a significant enhancement of the tiny intrinsic non-Gaussianity produced during inflation in single-field slow-roll models.

inflation
fluid
effect: nonlinear
space-time: Robertson-Walker
space-time: perturbation
tensor: energy-momentum
Einstein equation

References(37)

Figures(0)

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