Multiple Field Inflation and Signatures of Heavy Physics in the CMB

Abstract

In this master thesis we study multi-field inflation and the UV sensitivity of certain models of inflation in supergravity. We first introduce inflation and its current observational status. Then we provide an overview of studies of multiple field inflation in the literature. We translate between the different notations and definitions used in various papers and study the different approximation schemes and their regime of validity. Finally we perform a numerical study of models of multi-field inflation from recent papers in the literature. We study if the current and future experiments might be able to detect the presence of the additional fields in these models.

arXiv comment88 pages, 26 figures, master thesis

References in corpus (36)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Planck 2013 results. XVI. Cosmological parameters
• The Seventh Data Release of the Sloan Digital Sky Survey
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• An All-Sky Analysis of Polarization in the Microwave Background
• Planck 2013 results. XXII. Constraints on inflation
• Cosmology and Fundamental Physics with the Euclid Satellite
• Statistics of Cosmic Microwave Background Polarization
• Cosmology and fundamental physics with the Euclid satellite
• What would we learn by detecting a gravitational wave signal in the cosmic microwave background anisotropy?
• Cosmic Microwave Background Anisotropies
• Adiabatic and entropy perturbations from inflation
• A more accurate analytic calculation of the spectrum of cosmological perturbations produced during inflation
• Features of heavy physics in the CMB power spectrum
• Adiabatic Modes in Cosmology
• Superconformal generalizations of the Starobinsky model
• Primordial Nucleosynthesis in Light of WMAP
• TASI Lectures on Inflation
• Curvature and isocurvature perturbations in two-field inflation
• Simple exercises to flatten your potential
• Mass hierarchies and non-decoupling in multi-scalar field dynamics
• Heavy fields, reduced speeds of sound and decoupling during inflation
• Strongly Coupled Perturbations in Two-Field Inflationary Models
• Correlating features in the primordial spectra
• The Imaginary Starobinsky Model
• Localized correlated features in the CMB power spectrum and primordial bispectrum from a transient reduction in the speed of sound
• Density perturbations arising from multiple field slow-roll inflation
• A No-Scale Inflationary Model to Fit Them All
• Is Imaginary Starobinsky Model Real?
• Backreaction of a massless minimally coupled scalar field from inflationary quantum fluctuations
• The Imaginary Starobinsky Model and Higher Curvature Corrections
• F-term uplifting and moduli stabilization consistent with Kahler invariance
• Cosmological Perturbation Theory and Structure Formation