Scale-invariant Perturbations from Chaotic Inflation

Abstract

Vacuum fluctuations in the inflaton field driving chaotic inflation with a quadratic potential give a red spectrum of primordial density perturbations, n=0.97. However angular fluctuations in an O(N)-symmetric quadratic potential have a very nearly scale-invariant spectrum, n=0.9998. We investigate the possibility that these isocurvature field perturbations could give the dominant contribution to the primordial density perturbation after inflation.

10 pages, LaTeX with RevTex, no figures

Cited by in corpus (20)

• Review of local non-Gaussianity from multi-field inflation
• Random Matrices and the Spectrum of N-flation
• Curvature and isocurvature perturbations from two-field inflation in a slow-roll expansion
• Multiple field inflation
• Local non-Gaussianity from inflation
• Non-Gaussianity beyond slow roll in multi-field inflation
• Primordial Non-Gaussianities of General Multiple Field Inflation
• M-flation: Inflation From Matrix Valued Scalar Fields
• Nflation: multi-field inflationary dynamics and perturbations
• Non-Gaussianity and the Cosmic Microwave Background Anisotropies
• Preheating and the non-gaussianity of the curvature perturbation
• On Perturbation Spectra of N-flation
• Constraints on generating the primordial curvature perturbation and non-Gaussianity from instant preheating
• Reheating, Multifield Inflation and the Fate of the Primordial Observables
• Modulated Perturbations from Instant Preheating after new Ekpyrosis
• Beauty is Distractive: Particle production during multifield inflation
• Affleck-Dine Baryogenesis, Split Supersymmetry, and Inflation
• Cosmic microwave background and large-scale structure constraints on a simple quintessential inflation model
• Stability of multi-field cosmological solutions
• Generation of perturbation after multi-field inflation