The dynamics of the scalar field driving inflation can be described as a Brownian motion under the influence of a classical force arising from its self-interactions. Fluctuations of the inflaton on large scales give rise to density perturbations. If the inflaton potential is not too flat, as in models of nonexponential inflation, these perturbations can be non-Gaussian. In a power-law inflation with an exponential potential non-Gaussian scale-invariant adiabatic perturbations are rapidly produced.
Non-Gaussian Perturbations from Inflationary Dynamics
LUCCHIN, FRANCESCO;MATARRESE, SABINO
1988
Abstract
The dynamics of the scalar field driving inflation can be described as a Brownian motion under the influence of a classical force arising from its self-interactions. Fluctuations of the inflaton on large scales give rise to density perturbations. If the inflaton potential is not too flat, as in models of nonexponential inflation, these perturbations can be non-Gaussian. In a power-law inflation with an exponential potential non-Gaussian scale-invariant adiabatic perturbations are rapidly produced.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
