Features of the inflaton potential and the power spectrum of cosmological perturbations
Kyriaki Kefala, George P. Kodaxis, Ioanna D. Stamou, N. Tetradis
Abstract
We discuss features of the inflaton potential that can lead to a strong enhancement of the power spectrum of curvature perturbations. We show that a steep steplike feature induces an enhancement of the spectrum by several orders of magnitude within a certain range of scales. It also produces a distinctive oscillatory pattern. We study the origin of the oscillations and the additive effect of several steps. We analyze a simplified potential, with an ad hoc introduction of steps at certain field values, but also discuss the possible application to supergravity models.
Topics & Concepts
InflatonSpectral densityPhysicsSupergravityCurvatureSpectrum (functional analysis)Theoretical physicsRange (aeronautics)Inflation (cosmology)Feature (linguistics)Field (mathematics)Statistical physicsClassical mechanicsQuantum mechanicsSupersymmetryGeometryMathematicsPure mathematicsComposite materialMaterials scienceStatisticsLinguisticsPhilosophyCosmology and Gravitation TheoriesBlack Holes and Theoretical PhysicsPulsars and Gravitational Waves Research