Open AccessNon-linearity analysis for cosmological inflation model with minimal and non-minimal coupling of scalar field from Horndeski theory
Author(s) -
Getbogi Hikmawan,
Agus Suroso,
Freddy P. Zen
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1245/1/012082
Subject(s) - spectral index , physics , inflation (cosmology) , scalar field , scalar (mathematics) , linearity , theoretical physics , coupling (piping) , minimal coupling , tensor (intrinsic definition) , mathematical physics , quantum electrodynamics , spectral line , quantum mechanics , mathematics , geometry , mechanical engineering , engineering
In this work, we analyze the non-linearity aspect of perturbations generated in early times for cosmological inflation model with minimal and non-minimal couplings of scalar field from Horndeski theory. We study the spectral index of the perturbations and tensor-to-scalar ratio and can be seen as the evidence for inflation for some responsible coupling constant. We get the sign of non-linearity from the spectral index and tensor-to-scalar ratio for this model, and this result can be analyzed further to find non-Gaussianity.