Primordial Non-Gaussianities from Inflation Models

Abstract

This is a pedagogical review on primordial non-Gaussianities from inflation models. We introduce formalisms and techniques that are used to compute such quantities. We review different mechanisms which can generate observable large non-Gaussianities during inflation, and distinctive signatures they leave on the non-Gaussian profiles. They are potentially powerful probes to the dynamics of inflation. We also provide a non-technical and qualitative summary of the main results and underlying physics.

84 pages, invited review for special issue of Advances in Astronomy on "Testing the Gaussianity and Statistical Isotropy of the Universe"; v3, various improvement and corrections, especially in Sec.6.4, 8.1 & 9.2

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Cited by in corpus (22)

• Scale-dependent non-Gaussianity probes inflationary physics
• Folded Resonant Non-Gaussianity in General Single Field Inflation
• A generalized local ansatz and its effect on halo bias
• Large non-Gaussianities in the Effective Field Theory Approach to Single-Field Inflation: the Trispectrum
• A Note on Calm Excited States of Inflation
• Holographic Non-Gaussianity
• Inflation in Entropic Cosmology: Primordial Perturbations and non-Gaussianities
• A note on the role of the boundary terms for the non-Gaussianity in general k-inflation
• Resonant Trispectrum and a Dozen More Primordial N-point functions
• Cosmological UV/IR Divergences and de-Sitter Spacetime
• On the squeezed limit of the bispectrum in general single field inflation
• Scale-Dependent Non-Gaussianity as a Generalization of the Local Model
• Non-Gaussianity in single field models without slow-roll
• A Study of High-Order Non-Gaussianity with Applications to Massive Clusters and Large Voids
• Non-Gaussianities of Single Field Inflation with Non-minimal Coupling
• Primordial Features as Evidence for Inflation
• Tilt and Running of Cosmological Observables in Generalized Single-Field Inflation
• An analytic approach to perturbations from an initially anisotropic universe
• Scale-dependent Bias from the Reconstruction of Non-Gaussian Distributions
• Strongly Coupled Inflaton
• Impact of Instrumental Systematics on the CMB Bispectrum
• Effective Field Theory for Inflation