A Multiple Step-like Spectrum of Primordial Perturbation

Abstract

We show that if the inflaton effective potential has multiple discontinuous points in its first derivative, the spectrum of primordial perturbation will be multiple step-like. We give a general analysis by applying a simple model. In principle, as long as the height of step is low enough, the result of spectrum will be consistent with observations.

minor changes and Refs. added, publish in PLB

References in corpus (20)

• Oscillations in the CMB from Axion Monodromy Inflation
• Generation and Characterization of Large Non-Gaussianities in Single Field Inflation
• New Universal Local Feature in the Inflationary Perturbation Spectrum
• New Constraints on Oscillations in the Primordial Spectrum of Inflationary Perturbations
• Primordial features due to a step in the inflaton potential
• Particle Production During Inflation: Observational Constraints and Signatures
• Evolution of Metric Perturbations in Quintom Bounce model
• Running Spectral Index from Inflation with Modulations
• Effects of particle production during inflation
• Energy Transfer in Multi Field Inflation and Cosmological Perturbations
• Oscillations in the inflaton potential?
• On Features and Nongaussianity from Inflationary Particle Production
• Is a step in the primordial spectral index favored by CMB data ?
• Primordial perturbations and non-Gaussianities from modulated trapping
• A Meandering Inflaton
• Observational hints on the Big Bounce
• Multi-Field Inflation on the Landscape
• Brane Annihilations during Inflation
• Phantom Inflation with A Steplike Potential
• Observable Signatures of Inflaton Decays

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• Ferrimagnet GdFeCo characterization for spin-orbitronics: large field-like and damping-like torques