Open AccessNonlinearity analysis for cosmological inflation with minimal and non-minimal coupling of scalar field from horndeski theory for special cases: de sitter expansion and decaying scalar field
Author(s) -
Getbogi Hikmawan,
Agus Suroso,
Freddy P. Zen
Publication year - 2021
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 - 10.1088/1742-6596/1949/1/012001
Subject(s) - physics , scalar field , inflation (cosmology) , spectral index , de sitter universe , scalar (mathematics) , nonlinear system , mathematical physics , field (mathematics) , coupling (piping) , minimal coupling , quantum electrodynamics , classical mechanics , theoretical physics , quantum mechanics , spectral line , universe , mathematics , geometry , mechanical engineering , pure mathematics , engineering
In this work, we consider De Sitter expansion and decaying scalar field in cosmological model with combination of minimal and non-minimal coupling of scalar field from Horndeski theory. As a continuity of the previous work, after the background solution and condition obtained, we continue the analysis to the nonlinearity aspect of perturbations via the spectral index of the perturbations. Spectral index of the perturbations and tensor to-scalar ratio of these special cases give sign of inflation model.