Cosmological correlation functions in scalar and vector inflationary models
arXiv:1004.1829
Abstract
This thesis is centered on three main subjects within the theory of inflation and cosmological perturbations: loop corrections to the power spectrum of curvature fluctuations generated during inflation; evolution of cosmological fluctuations in anisotropic pre-inflationary cosmologies; statistical anisotropy and non-Gaussianity predictions of models of inflation populated with vector fields. Currently, what makes even more interesting the study of 2-nd and higher order corrections to cosmological correlation functions as well as the computation of higher-than-two order correlators, is the almost unprecedented chance to confront theories with new and increasingly accurate experimental data that will shed more light in the physics of the early Universe. In the context of loop calculations, we have computed the corrections arising from scalar-tensor interactions in models of single-field inflation (both for the standard slow-roll model and for models described by Lagrangians with non-canonical kinetic terms). In the context of anisotropic cosmologies, also motivated by the observation of "anomalies" in the Cosmic Microwave Background (CMB) fluctuations, we have computed the bispectrum and the trispectrum of the curvature fluctuations in inflationary models with SU(2) vector fields, analyzing the statistical anisotropy features of the correlators in these models; finally, we have studied cosmological perturbations for a Universe with a Bianchi type-I background metric, with an energy density dominated by a pressureless fluid and in the presence of a cosmological constant.
Ph.D thesis
References in corpus (81)
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Non-Gaussian features of primordial fluctuations in single field inflationary models
- Generating the curvature perturbation without an inflaton
- 4-Year COBE DMR Cosmic Microwave Background Observations: Maps and Basic Results
- DBI in the Sky
- Observational Signatures and Non-Gaussianities of General Single Field Inflation
- Quantum Contributions to Cosmological Correlations
- Adiabatic CMB perturbations in pre-big bang string cosmology
- The primordial density perturbation in the curvaton scenario
- Asymmetries in the CMB anisotropy field
- The inflationary prediction for primordial non-gaussianity
- The significance of the largest scale CMB fluctuations in WMAP
- Quasi-Single Field Inflation and Non-Gaussianities
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Are There Cosmic Microwave Background Anomalies?
- Detection of non-Gaussianity in the WMAP 1-year data using spherical wavelets
- The axis of evil
- Non-Gaussianities in Single Field Inflation and their Optimal Limits from the WMAP 5-year Data
- Non-Gaussianity of the primordial perturbation in the curvaton model
- Inflationary Universe with Anisotropic Hair
- Imprints of a Primordial Preferred Direction on the Microwave Background
- Vector Inflation
- Generation of Large-Scale Magnetic Fields in Single-Field Inflation
- Vector Field Models of Inflation and Dark Energy
- Quantum Contributions to Cosmological Correlations II: Can These Corrections Become Large?
- Could dark energy be vector-like?
- On Non-Gaussianity in the Curvaton Scenario
- Metric perturbations in two-field inflation
- Non-Gaussianity from Inflation
- Correlated adiabatic and isocurvature perturbations from double inflation
- Estimators for CMB Statistical Anisotropy
- Primordial trispectrum from inflation
- Super-Hubble de Sitter Fluctuations and the Dynamical RG
- Generating the curvature perturbation at the end of inflation
- Detecting a small perturbation through its non-Gaussianity
- Theory of cosmological perturbations in an anisotropic universe
- Optimal limits on f_{NL}^{local} from WMAP 5-year data
- Isocurvature Perturbations in Multiple Inflationary Models
- The Angular Trispectra of CMB Temperature and Polarization
- Angular Trispectrum of CMB Temperature Anisotropy from Primordial Non-Gaussianity with the Full Radiation Transfer Function
- Predictions from an anisotropic inflationary era
- The Inflationary Trispectrum for Models with Large Non-Gaussianities
- CMB Anisotropies and Inflation from Non-Standard Spinors
- Ghost instabilities of cosmological models with vector fields nonminimally coupled to the curvature
- Can a vector field be responsible for the curvature perturbation in the Universe?
- Anisotropically Inflating Universes
- Spinors, Inflation, and Non-Singular Cyclic Cosmologies
- Instability of the ACW model, and problems with massive vectors during inflation
- One-loop corrections to the curvature perturbation from inflation
- Primordial Power Spectra from Anisotropic Inflation
- On the divergences of inflationary superhorizon perturbations
- Anisotropic Inflation from Vector Impurity
- On the evolution of universes in quadratic theories of gravity
- Dark energy as a massive vector field
- Non-gaussianity from the trispectrum in general single field inflation
- Inflation from N-Forms and its stability
- Signature of primordial non-Gaussianity of phi^3-type in the mass function and bias of dark matter haloes
- Inflation and dark energy from three-forms
- Bayesian analysis of an anisotropic universe model: systematics and polarization
- P-nflation: generating cosmic Inflation with p-forms
- Vector Curvaton with varying Kinetic Function
- On the full trispectrum in single field DBI-inflation
- Vector Curvaton without Instabilities
- Anisotropic non-Gaussianity from vector field perturbations
- Simple Bounds from the Perturbative Regime of Inflation
- Three-form cosmology
- On the generation of density perturbations at the end of inflation
- Cosmological perturbations from vector inflation
- Non-minimally coupled vector curvaton
- On the full quantum trispectrum in multi-field DBI inflation
- Non-gaussianity from the trispectrum and vector field perturbations
- Primordial Trispectrum from Entropy Perturbations in Multifield DBI Model
- One-loop graviton corrections to the curvature perturbation from inflation
- Cosmic vector for dark energy: constraints from SN, CMB and BAO
- Constraints on f_nl and g_nl from the analysis of the N-pdf of the CMB large scale anisotropies
- Gravity Waves Signatures from Anisotropic pre-Inflation
- Spectrum of Perturbations in Anisotropic Inflationary Universe with Vector Hair
- The structure of correlation functions in single field inflation
- Scalar perturbations in p-nflation: the 3-form case
- Perturbation Growth in Anisotropic Cosmologies
- Dirac-field model of inflation in Einstein-Cartan theory