Multiple field inflation

Abstract

Inflation offers a simple model for very early evolution of our Universe and the origin of primordial perturbations on large scales. Over the last 25 years we have become familiar with the predictions of single-field models, but inflation with more than one light scalar field can alter preconceptions about the inflationary dynamics and our predictions for the primordial perturbations. I will discuss how future observational data could distinguish between inflation driven by one field, or many fields. As an example, I briefly review the curvaton as an alternative to the inflaton scenario for the origin of structure.

27 pages, no figures. To appear in proceedings of 22nd IAP Colloquium, Inflation +25, Paris, June 2006

References in corpus (57)

• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• Generating the curvature perturbation without an inflaton
• Hybrid Inflation
• False Vacuum Inflation with Einstein Gravity
• Acoustic Signatures in the Primary Microwave Background Bispectrum
• Inflation Dynamics and Reheating
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Adiabatic CMB perturbations in pre-big bang string cosmology
• A new approach to the evolution of cosmological perturbations on large scales
• Effects of Cosmological Moduli Fields on Cosmic Microwave Background
• Reconstructing the Inflaton Potential --- an Overview
• A general proof of the conservation of the curvature perturbation
• The primordial density perturbation in the curvaton scenario
• Nongaussian Isocurvature Perturbations from Inflation
• Adiabatic and entropy perturbations from inflation
• The inflationary prediction for primordial non-gaussianity
• Assisted inflation
• Super-Horizon Scale Dynamics of Multi-Scalar Inflation
• Primordial non-gaussianities in single field inflation
• Non-Gaussianity of the primordial perturbation in the curvaton model
• Cosmological consequences of MSSM flat directions
• Primordial non-gaussianities from multiple-field inflation
• Non-Gaussianity in multi-field inflation
• On Non-Gaussianity in the Curvaton Scenario
• Non-Gaussianities in models with a varying inflaton decay rate
• Scalar perturbations during multiple-field slow-roll inflation
• An Observational Test of Two-field Inflation
• Correlated adiabatic and isocurvature perturbations from double inflation
• Primordial trispectrum from inflation
• Leptogenesis from $\tilde{N}$-dominated early universe
• The Separate Universe Approach and the Evolution of Nonlinear Superhorizon Cosmological Perturbations
• Large-scale curvature and entropy perturbations for multiple interacting fluids
• The Angular Trispectra of CMB Temperature and Polarization
• Adiabatic and Isocurvature Perturbations for Multifield Generalized Einstein Models
• Conserved cosmological perturbations
• Observational constraints on the curvaton model of inflation
• Curvature and isocurvature perturbations from two-field inflation in a slow-roll expansion
• The influence of cosmological transitions on the evolution of density perturbations
• Inflation models and observation
• Dynamics of Assisted Inflation
• Adiabatic and Isocurvature Perturbations from Inflation: Power Spectra and Consistency Relations
• Evolution of non-linear cosmological perturbations
• A numerical study of non-gaussianity in the curvaton scenario
• On the Realization of Assisted Inflation
• Adiabatic and entropy perturbations with interacting fluids and fields
• Correlation-consistency cartography of the double inflation landscape
• Cosmological perturbation with two scalar fields in reheating after inflation
• Must Cosmological Perturbations Remain Non-Adiabatic After Multi-Field Inflation?
• Nflation: multi-field inflationary dynamics and perturbations
• Curvature and isocurvature perturbations in a three-fluid model of curvaton decay
• Multiple-field inflation and the CMB
• Can Non-Adiabatic Perturbations Arise After Single-Field Inflation?
• Dynamics and perturbations in assisted chaotic inflation
• Non-Gaussianity from Broken Symmetries
• On second-order superhorizon perturbations in multifield inflationary models
• Scale-invariant Perturbations from Chaotic Inflation

Cited by in corpus (101)

• Primordial Non-Gaussianities from Inflation Models
• Features and New Physical Scales in Primordial Observables: Theory and Observation
• Review of local non-Gaussianity from multi-field inflation
• Inflation, Cosmic Perturbations and Non-Gaussianities
• Symmetries and Loops in Inflation
• The Observational Status of Cosmic Inflation after Planck
• Inflation with multiple sound speeds: a model of multiple DBI type actions and non-Gaussianities
• M-flation: Inflation From Matrix Valued Scalar Fields
• Higgs-otic Inflation and String Theory
• Angular inflation in multi-field $\alpha$-attractors
• A Class of Effective Field Theory Models of Cosmic Acceleration
• A simple $F(\mathcal{R},\varphi )$ deformation of Starobinsky inflationary model
• N-flation from multiple DBI type actions
• Non-Gaussianity from Axion-Gauge Fields Interactions during Inflation
• Curvature perturbation in multi-field inflation with non-minimal coupling
• Nonlinear perturbations of cosmological scalar fields with non-standard kinetic terms
• Higher-order modified Starobinsky inflation
• Generating primordial features at large scales in two field models of inflation
• Exact Solutions in Chiral Cosmology
• Primordial Perturbations from Multifield Inflation with Nonminimal Couplings
• Natural inflation with a nonminimal coupling to gravity
• Constraining chameleon field driven warm inflation with Planck 2018 data
• Spectroscopy of Masses and Couplings during Inflation
• Non-Gaussianity in single field models without slow-roll
• The Harder They Fall, the Bigger They Become: Tidal Trapping of Strings by Microstate Geometries
• Universality and scaling in multi-field $\alpha$-attractor preheating
• Preheating after N-flation
• To Positivity and Beyond, where Higgs-Dilaton Inflation has never gone before
• Probing the inflationary particle content: extra spin-2 field
• COSMOS-$e^{\prime }$- soft Higgsotic attractors
• Cosmological perturbations for an inflaton field coupled to radiation
• Non-singular Power-law and Assisted inflation in Loop Quantum Cosmology
• Neutrino masses and superheavy dark matter in the 3-3-1-1 model
• Multi-field Inflation in High-Slope Potentials
• Tensor non-Gaussianities from Non-minimal Coupling to the Inflaton
• Dynamics of Chiral Cosmology
• Cosmological Solutions in Multiscalar Field Theory
• Higher-order extension of Starobinsky inflation: initial conditions, slow-roll regime, and reheating phase
• Two-field Kähler moduli inflation on large volume moduli stabilization
• Inflation in a two 3-form fields scenario
• Staggered Multi-Field Inflation
• Multi-Field Inflation on the Landscape
• Warming up for Planck
• On the Suppression of Parametric Resonance and the Viability of Tachyonic Preheating after Multi-Field Inflation
• Further refining Swampland Conjecture on inflation in general scalar-tensor theories of gravity
• Unified Emergence of Energy Scales and Cosmic Inflation
• Modular Inflation Observables and $j$-Inflation Phenomenology
• The everpresent eta-problem: knowledge of all hidden sectors required
• Primordial curvature perturbation during and at the end of multi-field inflation
• Completely Dark Matter from Rapid-Turn Multifield Inflation
• Opening the reheating box in multifield inflation
• Chameleon Field Dynamics During Inflation
• Inflationary attractors and radiative corrections in light of ACT data
• Hubble multi-scalar inflation
• Entropy Production in Affine Inflation
• Composite Inflation and further refining dS swampland conjecture
• Phenomenology of the minimal inflation scenario: inflationary trajectories and particle production
• Non-Gaussianities in a two-field generalization of Natural Inflation
• Primordial tensor bispectra in $\mu$-CMB cross-correlations
• Non-Gaussian Shape Recognition
• Non-Gaussian signatures of general inflationary trajectories
• A General Framework of Automorphic Inflation
• Asymptotic behavior of $N$-fields Chiral Cosmology
• Inflation and dark matter after spontaneous Planck scale generation by hidden chiral symmetry breaking
• Dynamics of Cosmological Perturbations in Multi-Speed Inflation
• Natural Hybrid Inflation Model with Large Non-Gaussianity
• Enhanced power spectra from multi-field inflation
• Rejuvenating the hope of a swampland consistent inflated multiverse with tachyonic inflation in the high energy RS-II Braneworld
• Asymmetric reheating from a symmetric inflationary potential
• Impact of freeze-in on dark matter isocurvature
• Dark energy with a shift-symmetric scalar field: obstacles, loophole hunting and dead ends
• A falsely fat curvaton with an observable running of the spectral tilt
• Complex Scalar fields in Scalar-Tensor and Scalar-Torsion theories
• Primordial gravitational wave of BICEP2 from dynamical double hybrid inflation
• Lorentz violating inflation and the Swampland
• Non-Gaussianities in generalized non-local $R^2$-like inflation
• Entropy Perturbations in N-flation
• Testing Two-Field Inflation
• Non-Linear Resonance in Relativistic Preheating
• Quintom fields from chiral anisotropic cosmology
• Prospects for Primordial Gravitational Waves in String Inflation
• Inflation with antisymmetric tensor field: new candidates
• Evolution of Quantum Nonequilibrium for Coupled Harmonic Oscillators
• Second-order corrections to Starobinsky inflation
• Multiscalar field cosmological model and possible solutions using Noether symmetry approach
• New exact solutions in multi-scalar field cosmology
• Derivative Interactions during Inflation: A Systematic Approach
• On the transition from complex to real scalar fields in modern cosmology
• Sustaining quasi de-Sitter inflation with bulk viscosity
• New inflationary exact solution from Lie symmetries
• Inflation using a triplet of Antisymmetric tensor fields
• Scalar and vector modes in inflation with antisymmetric tensor field
• Numerical evaluation of the tensor bispectrum in two field inflation
• Analytical study of classic models of Hybrid Inflation
• Viable Curvaton Models from the $f_{NL}$ Parameter
• Tilt and Tensor-to-Scalar Ratio in Multi-Scalar Field Inflation: Non-Sum-Separable Case
• Implications of single field inflation in general cosmological scenarios on the nature of dark energy given the swampland conjectures
• Constraints on polynomial inflation under power-law perturbations
• Anisotropic Spacetimes in Chiral Scalar Field Cosmology
• A gap between two approaches of dimensional reduction for a six-dimensional Kaluza-Klein theory
• Towards a de Sitter quintom-like cosmology from a reduction of a 7-dimensional $BF$ theory