Trapped inflation

2009/02/24 by Daniel Green, Bart Horn, Leonardo Senatore +1
Mathematics · Physics and Astronomy · #Amplitude #Anisotropy #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmology and Gravitation Theories #Equilateral triangle #Galaxies: Formation, Evolution, Phenomena #Gaussian #Geometry #Inflation (cosmology) #Mathematics #Moduli #Non-Gaussianity #Physics #Quantum electrodynamics #Quantum mechanics #Scalar (mathematics) #Spectral density #Statistical physics #Statistics #Theoretical physics #astro-ph.CO #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.80.063533

published as Phys.Rev.D80:063533,2009 · 32 pages, 3 figures

arxiv created 2009/02/24 · openalex publication_date 2009/09/25 · arxiv updated 2009/12/01 · openalex created_date 2020/07/02 · openalex updated_date 2026/08/05

Abstract

We analyze a distinctive mechanism for inflation in which particle production slows down a scalar field on a steep potential and show how it descends from angular moduli in string compactifications. The analysis of density perturbations---taking into account the integrated effect of the produced particles and their quantum fluctuations---requires somewhat new techniques that we develop. We then determine the conditions for this effect to produce 60 e-foldings of inflation with the correct amplitude of density perturbations at the Gaussian level and show that these requirements can be straightforwardly satisfied. Finally, we estimate the amplitude of the non-Gaussianity in the power spectrum and find a significant equilateral contribution.

Citations

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