GW170817-COMPATIBLE CONSTANT-ROLL PARAMETER ON EINSTEIN-GAUSS-BONNET INFLATION, MINIMAL, NON-MINIMAL, AND NON-MINIMAL DERIVATIVE COUPLINGS

• Main Author: Supriyadi, Izrul
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/57462
• Institution: Institut Teknologi Bandung

In this research, we study the inflation theories of Einstein-Gauss-Bonnet, minimal, non-minimal, and non-minimal derivative coupling with the constant-roll condition. Given the gravitational wave event, GW170817, which produces a gravitational wave speed was nearly equal to the speed of light, we constrain that speed of the tensor perturbation was nearly equal to unity, c2 T '1. We involve a scalar field potential whose its function can be obtained from the equation of motion by designating the Gauss-Bonnet coupling function. We use the linear and quadratic coupling function, which are their simplest functions. The one result obtained are able to produce observed quantities such as the spectral index for scalar perturbation, ns = 0:9642, the spectral index for tensor perturbation, nT = ????5:247110????4, and tensor-to-scalar ratio, r = 0:0041, which are compatible with the latest Planck data using slow-roll parameters obtained analytically.