Adiabatic and entropy perturbations from inflation

Abstract

We study adiabatic (curvature) and entropy (isocurvature) perturbations produced during a period of cosmological inflation that is driven by multiple scalar fields with an arbitrary interaction potential. A local rotation in field space is performed to separate out the adiabatic and entropy modes. The resulting field equations show explicitly how on large scales entropy perturbations can source adiabatic perturbations if the background solution follows a curved trajectory in field space, and how adiabatic perturbations cannot source entropy perturbations in the long-wavelength limit. It is the effective mass of the entropy field that determines the amplitude of entropy perturbations during inflation. We present two applications of the equations. First, we show why one in general expects the adiabatic and entropy perturbations to be correlated at the end of inflation, and calculate the cross-correlation in the context of a double inflation model with two non-interacting fields. Second, we consider two-field preheating after inflation, examining conditions under which entropy perturbations can alter the large-scale curvature perturbation and showing how our new formalism has advantages in numerical stability when the background solution follows a non-trivial trajectory in field space.

12 pages, 2 figures. Minor changes to text. Matches version to appear in Phys. Rev. D

References in corpus (27)

• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• A new approach to the evolution of cosmological perturbations on large scales
• Super-Horizon Scale Dynamics of Multi-Scalar Inflation
• Correlated adiabatic and isocurvature perturbations from double inflation
• The General Primordial Cosmic Perturbation
• Parametric Amplification of Gravitational Fluctuations During Reheating
• Parametric Amplification of Metric Fluctuations During Reheating in Two Field Models
• General Relativistic effects in preheating
• Metric preheating and limitations of linearized gravity
• Dynamics of Assisted Inflation
• Massless Metric Preheating
• An Isocurvature CDM Cosmogony. II. Observational Tests
• Correlated mixtures of adiabatic and isocurvature cosmological perturbations
• Restoring the sting to metric preheating
• Super-horizon perturbations and preheating
• Cosmological perturbation with two scalar fields in reheating after inflation
• Limits on isocurvature fluctuations from Boomerang and MAXIMA
• An Isocurvature CDM Cosmogony. I. A Worked Example of Evolution Through Inflation
• Density Perturbations in Multifield Inflationary Models
• On Metric Preheating
• New constraints on multi-field inflation with nonminimal coupling
• Features in the primordial power spectrum of double D-term inflation
• Constraining Isocurvature Fluctuations with the Planck Surveyor
• Multi-field fermionic preheating
• Perturbation amplitude in isocurvature inflation scenarios
• An Isocurvature Mechanism for Structure Formation
• Observational Implications of Axionic Isocurvature Fluctuations

Cited by in corpus (595)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Planck 2018 results. X. Constraints on inflation
• Non-Gaussianity from Inflation: Theory and Observations
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• Planck 2013 results. XXII. Constraints on inflation
• Inflation Dynamics and Reheating
• Effects of Cosmological Moduli Fields on Cosmic Microwave Background
• The primordial density perturbation in the curvaton scenario
• Primordial Non-Gaussianities from Inflation Models
• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• Bouncing Cosmologies: Progress and Problems
• Features of heavy physics in the CMB power spectrum
• Ekpyrotic and Cyclic Cosmology
• Cosmology with the Laser Interferometer Space Antenna
• New Ekpyrotic Cosmology
• Cosmology and Brane Worlds: A Review
• Adiabatic Modes in Cosmology
• Primordial non-gaussianities from multiple-field inflation
• Large non-Gaussianities with Intermediate Shapes from Quasi-Single Field Inflation
• Non-Gaussianity in multi-field inflation
• Scalaron from $R^2$-gravity as a Heavy Field
• Measuring primordial non-Gaussianity in the cosmic microwave background
• Non-Gaussianities in two-field inflation
• Brane World Cosmology
• Perturbations of the Quintom Models of Dark Energy and the Effects on Observations
• Scalar perturbations during multiple-field slow-roll inflation
• Higgs-Dilaton Cosmology: From the Early to the Late Universe
• Non-Gaussianity from Inflation
• An Observational Test of Two-field Inflation
• Perturbations in generalized multi-field inflation
• Non-Abelian Gauge Field Inflation
• Generating Ekpyrotic Curvature Perturbations Before the Big Bang
• The Separate Universe Approach and the Evolution of Nonlinear Superhorizon Cosmological Perturbations
• Infrared effects in inflationary correlation functions
• Large-scale curvature and entropy perturbations for multiple interacting fluids
• Curvature and isocurvature perturbations in two-field inflation
• Generating PBHs and small-scale GWs in two-field models of inflation
• Adiabatic and Isocurvature Perturbations for Multifield Generalized Einstein Models
• Seeding primordial black holes in multifield inflation
• Probing String Theory with Modulated Cosmological Fluctuations
• Primordial fluctuations and non-Gaussianities in multi-field DBI inflation
• Cosmological perturbations from multi-field inflation in generalized Einstein theories
• PBHs and secondary GWs from ultra slow roll and punctuated inflation
• A Cosmological Super-Bounce
• Mass hierarchies and non-decoupling in multi-scalar field dynamics
• Cosmological perturbations through a simple bounce
• On the importance of heavy fields during inflation
• A Low CMB Quadrupole from Dark Energy Isocurvature Perturbations
• Observational constraints on the curvaton model of inflation
• Curvature and isocurvature perturbations from two-field inflation in a slow-roll expansion
• Heavy fields, reduced speeds of sound and decoupling during inflation
• Non-linear isocurvature perturbations and non-Gaussianities
• Primordial Bispectrum from Multifield Inflation with Nonminimal Couplings
• Exploring Cosmic Origins with CORE: Inflation
• Conditions for large non-Gaussianity in two-field slow-roll inflation
• Initial Conditions for Inflation
• Inflation, Cosmic Perturbations and Non-Gaussianities
• Two Field Matter Bounce Cosmology
• Multiple field inflation
• Adiabatic and Isocurvature Perturbations from Inflation: Power Spectra and Consistency Relations
• Strongly Coupled Perturbations in Two-Field Inflationary Models
• Isocurvature bounds on axions revisited
• The Matter Bounce Curvaton Scenario
• Inflationary perturbations near horizon crossing
• Local non-Gaussianity from inflation
• Geometrical Destabilization of Inflation
• Double Inflation and the Low CMB Quadrupole
• Non-Gaussian Density Fluctuations from Entropically Generated Curvature Perturbations in Ekpyrotic Models
• Primordial features due to a step in the inflaton potential
• Modulated fluctuations from hybrid inflation
• Adiabatic and entropy perturbations with interacting fluids and fields
• Inflation in Realistic D-Brane Models
• Curvature Perturbation Spectrum in Two-field Inflation with a Turning Trajectory
• Newtonian limit of nonlocal cosmology
• Correlated perturbations from inflation and the cosmic microwave background
• Hyperinflation
• Conformal-Frame (In)dependence of Cosmological Observations in Scalar-Tensor Theory
• Ghost conditions for Gauss-Bonnet cosmologies
• The Observational Status of Cosmic Inflation after Planck
• Effective Field Theory and Decoupling in Multi-field Inflation: An Illustrative Case Study
• Influence of heavy modes on perturbations in multiple field inflation
• Non-Gaussianities from ekpyrotic collapse with multiple fields
• Non-Gaussianity beyond slow roll in multi-field inflation
• Cosmological Perturbations with Multiple Fluids and Fields
• Isocurvature perturbations in the Ekpyrotic universe
• Spinflation
• Non-Gaussianity and statistical anisotropy from vector field populated inflationary models
• Preheating after Multifield Inflation with Nonminimal Couplings, I: Covariant Formalism and Attractor Behavior
• Inflation with multiple sound speeds: a model of multiple DBI type actions and non-Gaussianities
• Non-gaussianity from the bispectrum in general multiple field inflation
• Black hole formation from a general quadratic action for inflationary primordial fluctuations
• Quantitative bispectra from multifield inflation
• Imprints of Massive Primordial Fields on Large-Scale Structure
• Assisted Contraction
• Stochastic inflation in phase space: Is slow roll a stochastic attractor?
• CMB spectral distortions from small-scale isocurvature fluctuations
• Bounds on isocurvature perturbations from CMB and LSS data
• Spectral Running and Non-Gaussianity from Slow-Roll Inflation in Generalised Two--Field Models
• Stochastic inflation beyond slow roll
• The non-adiabatic pressure in general scalar field systems
• Cosmology of the Very Early Universe
• Correlation-consistency cartography of the double inflation landscape
• Inflationary spectra and violations of Bell inequalities
• Primordial Non-Gaussianities of General Multiple Field Inflation
• Multifield Dynamics of Higgs Inflation
• Hybrid inflation along waterfall trajectories
• On the Issue of the ζSeries Convergence and Loop Corrections in the Generation of Observable Primordial Non-Gaussianity in Slow-Roll Inflation. Part I: the Bispectrum
• Correlated Primordial Perturbations in Light of CMB and LSS Data
• Multifield DBI Inflation and Non-Gaussianities
• Nonlinear perturbations of cosmological scalar fields
• Multifield Inflation after Planck: Isocurvature Modes from Nonminimal Couplings
• Preheating after multifield inflation with nonminimal couplings, III: Dynamical spacetime results
• Energy Transfer in Multi Field Inflation and Cosmological Perturbations
• M-flation: Inflation From Matrix Valued Scalar Fields
• Primordial Non-Gaussianity in the Cosmic Microwave Background
• Primordial fluctuations and non-Gaussianities in sidetracked inflation
• Holographic Non-Gaussianity
• Intuitive understanding of non-gaussianity in ekpyrotic and cyclic models
• Cosmological Bootstrap in Slow Motion
• Cosmic Bounces and Cyclic Universes
• A Statistical Approach to Multifield Inflation: Many-field Perturbations Beyond Slow Roll
• Non-Gaussianity in Two-Field Inflation
• Non-Gaussian perturbations from multi-field inflation
• Lectures on inflation and cosmological perturbations
• Primordial Black Holes from Multifield Inflation with Nonminimal Couplings
• Primordial black holes and stochastic gravitational wave background from inflation with a noncanonical spectator field
• Primordial perturbations from inflation with a hyperbolic field-space
• Ekpyrotic collapse with multiple fields
• Ekpyrotic Non-Gaussianity -- A Review
• The Power Spectrum for a Multi-Component Inflaton to Second-Order Corrections in the Slow-Roll Expansion
• Cosmological perturbations from varying masses and couplings
• Multiple Fields in Stochastic Inflation
• Bootstrapping Multi-Field Inflation: non-Gaussianities from light scalars revisited
• Scalar field perturbations in Horava-Lifshitz cosmology
• Gauge-invariant perturbations at second order: multiple scalar fields on large scales
• On Perturbations in Warm Inflation
• Prospects of inflation in delicate D-brane cosmology
• Primordial fluctuations and non-Gaussianities from multifield DBI Galileon inflation
• On the Initial Conditions in New Ekpyrotic Cosmology
• Effective field theory of modified gravity with two scalar fields: dark energy and dark matter
• Curvature perturbations from ekpyrotic collapse with multiple fields
• Constraints on isocurvature models from the WMAP first-year data
• Higgs-otic Inflation and String Theory
• Correlated isocurvature perturbations from mixed inflaton-curvaton decay
• Super-Hubble Nonlinear Perturbations During Inflation
• Scaling attractors in multi-field inflation
• Curvature Perturbations from Broken Symmetries
• Nonperturbative analysis of the evolution of cosmological perturbations through a nonsingular bounce
• Revisiting small-scale fluctuations in $\alpha$-attractor models of inflation
• Multifield Cosmological Perturbations at Third Order and the Ekpyrotic Trispectrum
• Universality of multi-field $\alpha$-attractors
• Moment transport equations for non-Gaussianity
• Correlated adiabatic and isocurvature CMB fluctuations in the wake of the WMAP
• Bounds on CDM and neutrino isocurvature perturbations from CMB and LSS data
• The exact numerical treatment of inflationary models
• Overshooting, Critical Higgs Inflation and Second Order Gravitational Wave Signatures
• On the full quantum trispectrum in multi-field DBI inflation
• Squeezing the window on isocurvature modes with the Lyman-alpha forest
• Testing for double inflation with WMAP
• Density perturbations arising from multiple field slow-roll inflation
• Disformal transformation of cosmological perturbations
• Scale-invariance in expanding and contracting universes from two-field models
• Inflation in a scale invariant universe
• Universality in D-brane Inflation
• Note on the production of scale-invariant entropy perturbation in the Ekpyrotic universe
• The Benefits of CMB Delensing
• A manifestly covariant theory of multifield stochastic inflation in phase space: solving the discretisation ambiguity in stochastic inflation
• Lorentz boost and non-Gaussianity in multi-field DBI-inflation
• Correlated Isocurvature Fluctuation in Quintessence and Suppressed CMB Anisotropies at Low Multipoles
• Cumulative effects in inflation with ultra-light entropy modes
• Angular inflation in multi-field $\alpha$-attractors
• Hypernatural inflation
• SUGRA chaotic inflation and moduli stabilisation
• Slow-roll Inflation for Generalized Two-Field Lagrangians
• Some Aspects of Tachyon Field Cosmology
• Cosmological constraints on slow-roll inflation: an update
• Strongly Coupled Quasi-Single Field Inflation
• Inflationary perturbation theory is geometrical optics in phase space
• Ekpyrotic Perturbations With Small Non-Gaussian Corrections
• Conserved cosmological perturbation in Galileon models
• Perturbations in cosmologies with a scalar field and a perfect fluid
• Two-Field Analysis of No-Scale Supergravity Inflation
• Combined local and equilateral non-Gaussianities from multifield DBI inflation
• Shift Symmetry and Inflation in Supergravity
• Hints of Isocurvature Perturbations in the Cosmic Microwave Background?
• When can preheating affect the CMB?
• A simple $F(\mathcal{R},\varphi )$ deformation of Starobinsky inflationary model
• Search for Compensated Isocurvature Perturbations with Planck Power Spectra
• Curvature perturbation in multi-field inflation with non-minimal coupling
• Hyperinflation generalised: from its attractor mechanism to its tension with the `swampland conjectures'
• Probing small-scale cosmological fluctuations with the 21 cm forest: effects of neutrino mass, running spectral index and warm dark matter
• Constraints on primordial isocurvature perturbations and spatial curvature by Bayesian model selection
• Large Scale Structure from the Higgs fields of the Supersymmetric Standard Model
• Massive cosmological scalar perturbations
• Landscape tomography through primordial non-Gaussianity
• Oscillations During Inflation and the Cosmological Density Perturbations
• Decoherence from Isocurvature Perturbations in Inflation
• On the evolution of tachyonic perturbations at super-Hubble scales
• Scalar Dark Matter Production from Preheating and Structure Formation Constraints
• MultiModeCode: An efficient numerical solver for multifield inflation
• Sound Speed of Primordial Fluctuations in Supergravity Inflation
• Nonlinear perturbations of cosmological scalar fields with non-standard kinetic terms
• On Perturbation Spectra of N-flation
• Cosmological Perturbations Through a General Relativistic Bounce
• Oscillatory features in the curvature power spectrum after a sudden turn of the inflationary trajectory
• Multiple-field inflation and the CMB
• Primordial non-Gaussianities after Planck 2015: an introductory review
• Unstable growth of curvature perturbation in non-singular bouncing cosmologies
• Generating primordial features at large scales in two field models of inflation
• Anisotropic bispectrum of curvature perturbations from primordial non-Abelian vector fields
• Primordial Perturbations from Multifield Inflation with Nonminimal Couplings
• Backreaction and Stochastic Effects in Single Field Inflation
• Large power spectrum and primordial black holes in the effective theory of inflation
• Non-Gaussianity Generated by the Entropic Mechanism in Bouncing Cosmologies Made Simple
• Calculating Non-adiabatic Pressure Perturbations during Multi-field Inflation
• Inflation from Tachyon Condensation, Large N Effects
• On the inflationary massive field with a curved field manifold
• The Importance of Slow-roll Corrections During Multi-field Inflation
• Primordial Non-Gaussianities from the Trispectra in Multiple Field Inflationary Models
• Non-Gaussianities in Multifield Inflation: Superhorizon Evolution, Adiabaticity, and the Fate of fnl
• Spectroscopy of Masses and Couplings during Inflation
• Observational constraints on particle production during inflation
• Untangling features in the primordial spectra
• Affleck-Dine inflation
• Preheating with Non-Standard Kinetic Term
• Planck Constraints and Gravitational Wave Forecasts for Primordial Black Hole Dark Matter Seeded by Multifield Inflation
• Multi-field inflation with random potentials: field dimension, feature scale and non-Gaussianity
• Non-adiabatic cosmological production of ultra-light Dark Matter
• Transport equations for the inflationary spectral index
• The separate-universe approach and sudden transitions during inflation
• Cosmology in scalar-vector-tensor theories
• On the Issue of the ζSeries Convergence and Loop Corrections in the Generation of Observable Primordial Non-Gaussianity in Slow-Roll Inflation. Part II: the Trispectrum
• $\alpha$-vacuum and inflationary bispectrum
• On the Quantum-To-Classical Transition for Ekpyrotic Perturbations
• Multi-field G-inflation
• On reaching the adiabatic limit in multi-field inflation
• Cold Dark Matter Isocurvature Perturbations: Constraints and Model Selection
• Preheating after N-flation
• A note on perfect scalar fields
• Free-streaming and Coupled Dark Radiation Isocurvature Perturbations: Constraints and Application to the Hubble Tension
• No-Scale Inflation
• Time-Scales for Nonlinear Processes in Preheating after Multifield Inflation with Nonminimal Couplings
• Primordial black holes and gravitational waves from nonminimally coupled supergravity inflation
• Testing Inflation and Curvaton Scenarios with CMB Distortions
• Decoherence and entropy of primordial fluctuations II. The entropy budget
• Universality and scaling in multi-field $\alpha$-attractor preheating
• Affleck-Dine Leptogenesis from Higgs Inflation
• Absence of isentropic expansion in various inflation models
• On Primordial Black Holes from Rapid Turns in Two-field Models
• Multi-field Inflation with a Random Potential
• Cosmic inflation in a landscape of heavy-fields
• Constraints on generating the primordial curvature perturbation and non-Gaussianity from instant preheating
• Power Spectra beyond the Slow Roll Approximation in Theories with Non-Canonical Kinetic Terms
• Fat Inflatons, Large Turns and the $\eta$-problem
• Non-Gaussianity from Broken Symmetries
• Disformal invariance of curvature perturbation
• Preheating curvature perturbations with a coupled curvaton
• Modulated Perturbations from Instant Preheating after new Ekpyrosis
• Probing Two-Field Open Inflation by Resonant Signals in Correlation Functions
• On Non-Canonical Kinetic Terms and the Tilt of the Power Spectrum
• Spectrum of Perturbations in Anisotropic Inflationary Universe with Vector Hair
• Gravitational production of nearly thermal fermionic Dark Matter
• Braneworld non-minimal inflation with induced gravity
• On Non-Gaussianities in Multi-Field Inflation (N fields): Bi- and Tri-spectra beyond Slow-Roll
• Non-Gaussianities and Curvature Perturbations from Hybrid Inflation
• Consistency Relations for Non-Gaussianity
• Reconstructing the Inflationary Landscape with Cosmological Data
• Mild Non-Gaussianities under Perturbative Control from Rapid-Turn Inflation Models
• Contribution of the hybrid inflation waterfall to the primordial curvature perturbation
• Large-scale Perturbations from the Waterfall Field in Hybrid Inflation
• Enhanced Curvature Perturbation and Primordial Black Hole Formation in Two-stage Inflation with a break
• A geometrical approach to nonlinear perturbations in relativistic cosmology
• Ekpyrotic loop quantum cosmology
• Non-Gaussian Stochastic Gravitational Waves from Phase Transitions
• WarmSPy: a numerical study of cosmological perturbations in warm inflation
• DBI inflation with a non-minimally coupled Gauss-Bonnet term
• Multiple kinetic k-essence, phantom barrier crossing and stability
• Curvature Perturbations and non-Gaussianities from Waterfall Phase Transition during Inflation
• Modulated Inflation
• Type II Seesaw Leptogenesis
• Constant roll inflation in multifield models
• Rollercoaster Cosmology
• Preheating and Entropy Perturbations in Axion Monodromy Inflation
• Comparing multi-field primordial feature models with the Planck data
• Constraints on holographic multi-field inflation and models based on the Hamilton-Jacobi formalism
• Two-field disformal transformation and mimetic cosmology
• Analysis of scalar perturbations in cosmological models with a non-local scalar field
• On the viability of m**2 phi**2 and natural inflation
• Schwinger Mechanism During Inflation
• A Tip for Landscape Riders: Multi-Field Inflation Can Fulfill the Swampland Distance Conjecture
• No Large Scale Curvature Perturbations during Waterfall of Hybrid Inflation
• Extended Slow-Roll Conditions and Primordial Fluctuations: Multiple Scalar Fields and Generalized Gravity
• Converting entropy to curvature perturbations after a cosmic bounce
• Multi-field inflation from holography
• Power Spectra Based Planck Constraints on Compensated Isocurvature, and Forecasts for LiteBIRD and CORE Space Missions
• Quintessence dynamics with two scalar fields and mixed kinetic terms
• Non-Gaussianity and Gravitational Waves from Quadratic and Self-interacting Curvaton
• Separable and non-separable multi-field inflation and large non-Gaussianity
• Non-linear curvature perturbation in multi-field inflation models with non-minimal coupling
• On second-order superhorizon perturbations in multifield inflationary models
• The effects of a fast-turning trajectory in multiple-field inflation
• Consistency relations for sharp features in the primordial spectra
• Axiverse cosmology and the energy scale of inflation
• Isocurvature modes and Baryon Acoustic Oscillations
• A Study of Structure Formation and Reheating in the D3/D7 Brane Inflation Model
• Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
• Double Monodromy Inflation: A Gravity Waves Factory for CMB-S4, LiteBIRD and LISA
• Non-thermal production of Dark Matter after Inflation
• Manyfield Inflation in Random Potentials
• Viable tensor-to-scalar ratio in a symmetric matter bounce
• Modular invariant inflation
• Vacuum and Gravitons of Relic Gravitational Waves, and Regularization of Spectrum and Energy-Momentum Tensor
• Non-Gaussianity, Isocurvature Perturbation, Gravitational Waves and a No-Go Theorem for Isocurvaton
• Two-field Kähler moduli inflation on large volume moduli stabilization
• Boundary Inflation and the WMAP Data
• Large N Cosmology
• Sharp turns in axion monodromy: primordial black holes and gravitational waves
• Scale-invariant Perturbations from Chaotic Inflation
• Inflation in a two 3-form fields scenario
• Staggered Multi-Field Inflation
• Gravity on branes
• Cosmological density perturbations from perturbed couplings
• Estimating the amount of vorticity generated by cosmological perturbations in the early universe
• Large trispectrum in two-field slow-roll inflation
• Multiple Field Ultra Slow Roll Inflation: Primordial Black Holes From Straight Bulk And Distorted Boundary
• Recursive Stochastic Effects in Valley Hybrid Inflation
• Future constraints on neutrino isocurvature perturbations in the curvaton scenario
• Evolution of non-Gaussianity in multi-scalar field models
• The effects of Non-Gaussian initial conditions on the structure and substructure of Cold Dark Matter halos
• Scalar perturbations from inflation in the presence of gauge fields
• Planck constraints on Higgs modulated reheating of renormalization group improved inflation
• Suppression of Entropy Perturbations in Multi--Field Inflation on the Brane
• On backreaction effects in geometrical destabilisation of inflation
• Bispectra from two-field inflation using the long-wavelength formalism
• The Eisenhart Lift for Field Theories
• Disformally coupled inflation
• Multi-field effects in a simple extension of $R^2$ inflation
• On the growth of perturbations in interacting dark energy and dark matter fluids
• Generic slow-roll and non-gaussianity parameters in $f(R)$ theories
• CMB constraints on non-thermal leptogenesis
• Isocurvature Constraints on Scalar Dark Matter Production from the Inflaton
• Observational signatures of the parametric amplification of gravitational waves during reheating after inflation
• Brane Annihilations during Inflation
• String-inspired cosmology
• On Cross-correlations between Curvature and Isocurvature Perturbations during Inflation
• The Non-Minimal Ekpyrotic Trispectrum
• Adiabaticity and the Fate of Non-Gaussianities: The Trispectrum and Beyond
• Isocurvature modes and Baryon Acoustic Oscillations II: gains from combining CMB and Large Scale Structure
• Modular Inflation Observables and $j$-Inflation Phenomenology
• Correlating CMB Spectral Distortions with Temperature: what do we learn on Inflation?
• The Cosmological Constant Problem and Inflation in the String Landscape
• Effect of transitions in the Planck mass during inflation on primordial power spectra
• Two-field mimetic gravity revisited and Hamiltonian analysis
• Multifield dynamics of supersymmetric Higgs inflation in SU(5) GUT
• The effect of multiple features on the power spectrum in two-field inflation
• Particle Production in Ekpyrotic Scenarios
• Effective Field Theory of Multi-Field Inflation a la Weinberg
• Cosmological matching conditions
• Synergistic warm inflation
• Exact and slow-roll solutions for exponential power-law inflation connected with f(R) gravity and observational constraints
• Cold Dark Matter Isocurvature Perturbations: Cosmological Constraints and Applications
• Local non-Gaussianity from rapidly varying sound speeds
• Inflation with multiple vector fields and non-Gaussianities
• Sneutrino condensate as a candidate for the hot big bang cosmology
• Inflationary Predictions and Moduli Masses
• Cosmological Scaling Solutions for Multiple Scalar Fields
• Constraints on neutrino density and velocity isocurvature modes from WMAP-9 data
• Generalised perturbation equations in bouncing cosmologies
• Elementary Theorems Regarding Blue Isocurvature Perturbations
• Natural-Scalaron Inflation
• The Amplitude of Dark Energy Perturbations
• Fermion production from preheating-amplified metric perturbations
• Flipped GUT Inflation
• Primordial Perturbations During a Slow Expansion
• Brane preheating
• Affleck-Dine inflation in supergravity
• Kahler moduli double inflation
• CMB hemispherical asymmetry from non-linear isocurvature perturbations
• Loop Corrections to Cosmological Perturbations in Multi-field Inflationary Models
• Tracking the Multifield Dynamics with Cosmological Data: A Monte Carlo approach
• Stochastic inflation beyond slow roll: noise modelling and importance sampling
• Observational constraints on assisted k-inflation
• Polynomial Chaotic Inflation in Supergravity Revisited
• Generating the primordial curvature perturbations in preheating
• Diversity in the Phoenix Universe
• Generalized two-field $\alpha$-attractor models from geometrically finite hyperbolic surfaces
• Adiabatic regularization of power spectrum and stress tensor of relic gravitational wave without low-frequency distortion
• Sudden braking and turning with a two-field potential bump: primordial black hole formation
• Sourcing curvature modes with entropy perturbations in non-singular bouncing cosmologies
• Generation of gravitational waves in dynamical Chern-Simons gravity
• Charged Vector Inflation
• Evolution of the curvature perturbations during warm inflation
• How Delicate is Brane-Antibrane Inflation?
• Viable scalar spectral tilt and tensor-to-scalar ratio in near-matter bounces
• Numerical evaluation of inflationary 3-point functions on curved field space
• Observable Signatures of Inflaton Decays
• Constraints on moduli cosmology from the production of dark matter and baryon isocurvature fluctuations
• The Trans-Planckian Problem in the Healthy Extension of Horava-Lifshitz Gravity
• δN versus covariant perturbative approach to non-Gaussianity outside the horizon in multifield inflation
• Perturbations of Single-field Inflation in Modified Gravity Theory
• Scalar Perturbations Through Cycles
• $\mathcal{N}$-field cosmology in hyperbolic field space: stability and general solutions
• Path integral for multi-field inflation
• On the origin of entropy of gravitationally produced dark matter: the entanglement entropy
• The MESS of cosmological perturbations
• Probing Compensated Isocurvature with the 21-cm Signal during Cosmic Dawn
• Opening the reheating box in multifield inflation
• Curvature and Entropy Perturbations in Generalized Gravity
• New scenario of QCD axion clump formation I: Linear analysis
• Testing scale-invariant inflation against cosmological data
• Non-Minimal Warm Inflation and Perturbations on the Warped DGP Brane with Modified Induced Gravity
• Reheating in tachyonic inflationary models: Effects on the large scale curvature perturbations
• Hidden symmetries of two-field cosmological models
• Gauge-ready formulation of cosmological perturbations in scalar-vector-tensor theories
• Magnon Inflation: Slow Roll with Steep Potentials
• Delta-N formalism for the evolution of the curvature perturbations in generalized multi-field inflation
• Generalized two-field $\alpha$-attractors from the hyperbolic triply-punctured sphere
• Perturbation spectra in the warm $k$-inflation
• Effects of Light Fields During Inflation
• Nearly scale-invariant curvature modes from entropy perturbations during graceful exit
• Power-law modulation of the scalar power spectrum from a heavy field with a monomial potential
• Local random potentials of high differentiability to model the Landscape
• Long wavelength limit of evolution of nonlinear cosmological perturbations
• The Scale Factor Potential Approach to Inflation
• Parametric Resonance of Entropy Perturbations in Massless Preheating
• Remote Inflation: Hybrid-like inflation without hybrid-type potential
• $\alpha$-attractor-type Double Inflation
• Cosmological perturbations from multi-field inflation
• Non-Gaussianities in multi-field DBI inflation with a waterfall phase transition
• Effects of non-linearities on magnetic field generation
• Entropy Fluctuations in Brane Inflation Models
• Dynamically Generated Inflationary Lambda-CDM
• Non-Gaussianities in a two-field generalization of Natural Inflation
• Spinflation with Angular Potentials
• Curvaton and the inhomogeneous end of inflation
• Chaotic dynamics in preheating after inflation
• From heaviness to lightness during inflation
• Transformation of Primordial Cosmological Perturbations Under the General Extended Disformal Transformation
• Non-Gaussian CMB and LSS statistics beyond polyspectra
• Quantizing the Eisenhart Lift
• Modular Inflation at Higher Level $N$
• Effect of damped oscillations in the inflationary potential
• Large Blue Spectral Isocurvature Spectral Index Signals Time-Dependent Mass
• Boundary Inflation in the Moduli Space Approximation
• Circumventing the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
• Mixed non-Gaussianity in multiple-DBI inflation
• Stochastic inflation and primordial black holes
• Reconstruction of potentials of the hybrid inflation in the light of primordial black hole formation
• Embedding DBI inflation in scalar-tensor theory
• Dark Matter from Entropy Perturbations in Curved Field Space
• Evolution of curvature perturbation in generalized gravity theories
• Modulated preheating and isocurvature perturbations
• Squeezing the Axion
• Modulated inflation from kinetic term
• Supergravity and Two-Field Inflation Effects in Right-Handed Sneutrino-Modified D-term Inflation
• Non-Gaussianity in Multi-field Stochastic Inflation with the Scaling Approximation
• Predictions of mixed non-Gaussian cosmological density fields for the cosmic microwave background radiation
• Coupling structure of multi-field primordial perturbations
• Cosmological Perturbations of a Quartet of Scalar Fields with a Spatially Constant Gradient
• Remote Inflation as hybrid-like sneutrino/MSSM inflation
• Observational Constraints on Two-field Warm Inflation
• Revisiting isocurvature bounds in models unifying the axion with the inflaton
• General background conditions for K-bounce and adiabaticity
• Spectra and entropy of multi-field warm inflation
• A Fake Instability in String Inflation
• Enhanced power spectra from multi-field inflation
• Simultaneous effect of Modified Gravity and Primordial Non-Gaussianity in Large Scale Structure Observations
• Natural Inflation with Exponentially Small Tensor-To-Scalar Ratio
• Testing theories of Gravity and Supergravity with inflation and observations of the cosmic microwave background
• A Universal Bound on Excitations of Heavy Fields during Inflation
• Adiabatic and isocurvature perturbations in extended theories with kinetic couplings
• Stability of braneworlds with non-minimally coupled multi-scalar fields
• Dynamics of Cosmological Perturbations in Multi-Speed Inflation
• Multiple Field Inflation and Signatures of Heavy Physics in the CMB
• Non-adiabatic perturbations in multi-component perfect fluids
• Non-Gaussianity in two-field inflation beyond the slow-roll approximation
• Improving Constraints on Inflation with CMB Delensing
• Multi-field Cuscuton Cosmology
• Exploring primordial black holes and gravitational waves with R-symmetric GUT Higgs inflation
• Multi-field Mimetic Gravity
• Asymmetric reheating from a symmetric inflationary potential
• Perturbation Spectra and Renormalization-Group Techniques in Double-Field Inflation and Quantum Gravity Cosmology
• Scale-Dependent Gravitational Couplings in Parameterised Post-Newtonian Cosmology
• Island Cosmology in the Landscape
• Inflationary parameters and primordial perturbation spectra
• Inflation and Scale-invariant $R^2$-Gravity
• Non-Gaussianity in Island Cosmology
• Spectrum of Curvature Perturbation of Multi-field Inflation with Small-Field Potential
• The Origin of the Large-Scale Structure in the Universe: Theoretical and Statistical Aspects
• Planck constraints on neutrino isocurvature density perturbations
• Preheating in an Asymptotically Safe Quantum Field Theory
• Baryogenesis in $R^2$-Higgs Inflation: the Gravitational Connection
• Curvatons and inhomogeneous scenarios with deviation from slow-roll
• Towards an Observational Appraisal of String Cosmology
• The two-field regime of natural inflation
• Generalized disformal invariance of cosmological perturbations with second-order field derivatives
• (Multi-field) Natural Inflation and Gravitational Waves
• Covariant second-order perturbations in generalized two-field inflation
• Two-field Warm Inflation and Its Scalar Perturbations on Large Scales
• Constraints on variations in inflaton decay rate from modulated preheating
• Loops in reheating and cosmological perturbations
• Conformal inflation with chameleon coupling
• Generically large nongaussianity in small multifield inflation
• Correlated Mixture Between Adiabatic and Isocurvature Fluctuations and Recent CMB Observations
• More on loops in reheating: Non-gaussianities and tensor power spectrum
• Covariant evolution of perturbations during reheating in two-field inflation
• Model-independent approach to effective sound speed in multi-field inflation
• Exposition to Staggered Multi-Field Inflation
• The Physical Content of Long Tensor Modes in Cosmology
• Moving Five-Branes and Membrane Instantons in Low Energy Heterotic M-Theory
• Moduli and Graviton Production during Moduli Stabilization
• Mimetic Curvaton
• Radiative corrections to scalar masses in de Sitter space
• Stochastic inflation and non-perturbative power spectrum beyond slow roll
• Isocurvature modes: joint analysis of the CMB power spectrum and bispectrum
• Dynamics of entropy perturbations in assisted dark energy with mixed kinetic terms
• Cosmological Perturbations: Vorticity, Isocurvature and Magnetic Fields
• Non-Gaussianities in DBI inflation with angular motion
• Flattened Axion Monodromy Beyond Two Derivatives
• Cosmology of fermionic dark energy coupled to curvature
• Entropic mechanisms with generalized scalar fields in the Ekpyrotic universe
• N-flation in Supergravity
• Reheating and Entropy Perturbations in Fibre Inflation
• Non-Minimal M-flation
• Particle physics model of curvaton inflation in a stable universe
• Tilted Ekpyrosis
• Conditions for the Absence of Infrared Sensitivity in Cosmological Probes in Any Gravity Theories
• Second-order cosmological perturbations produced by scalar-scalar coupling during inflation stage
• Entropy Perturbations in N-flation
• Aspects of warm-flat directions
• Testing Two-Field Inflation
• Inflationary Dynamics with Runaway Potentials
• Non-local Matching Condition and Scale-invariant Spectrum in Bouncing Cosmology
• Signature of short distance physics on inflation power spectrum and CMB anisotropy
• A model of cosmology and particle physics at an intermediate scale
• Non-gaussianity and Statistical Anisotropy in Cosmological Inflationary Models
• On the Consistency of Rapid-Turn Inflation
• The effects of anisotropy and non-adiabaticity on the evolution of comoving curvature perturbation
• Supersymmetric Dirac-Born-Infeld Axionic Inflation and Non-Gaussianity
• Study of the Growth of Entropy Modes in MSSM Flat Directions Decay: Constraints on the Parameter Space
• Origin of ultra-light fields during inflation and their suppressed non-Gaussianity
• Primordial black holes from the ultraslow-roll phase in the inflaton--curvaton mixed field inflation
• CMB and Cosmological Parameters: Current Status and Prospects
• Adiabatic and Isocurvature Perturbation Projections in Multi-Field Inflation
• Two-point correlators revisited: Fast and slow scales in multifield models of inflation
• Manifestly gauge invariant theory of the nonlinear cosmological perturbations in the leading order of the gradient expansion
• On the Hamilton-Jacobi approach to inflation beyond slow roll
• Inflationary perturbations with multiple scalar fields
• CMB lensing forecasts for constraining the primordial perturbations: adding to the CMB temperature and polarization information
• Loops in inflation with strongly non-geodesic motion
• Radiation-dominated bouncing model with slow contraction and inflation
• Inflation from a chaotic potential with a step
• Anatomy of geometrical destabilization of inflation
• de Sitter spacetime with a Becchi-Rouet-Stora quartet
• Cosmology Rounding the Cape
• Multi-field inflation and the field-space metric
• Nonminimal Couplings in the Early Universe: Multifield Models of Inflation and the Latest Observations
• Evolution of the spectral index after inflation
• Inflation: Where Do We Stand?
• Entropy mode loops and cosmological correlations during perturbative reheating
• Correlation of isocurvature perturbation and non-Gaussianity
• Cosmological constraints from Microwave Background Anisotropy and Polarization
• Numerical evaluation of the tensor bispectrum in two field inflation
• A model with two periods of inflation
• The Non-Adiabatic Pressure Perturbation and Non-Canonical Kinetic Terms in Multifield Inflation
• Adiabatic Duality: Duality of cosmological models with varying slow-roll parameter and sound speed
• Scalar Perturbation in Symmetric Lee-Wick Bouncing Universe
• Constant-rate inflation: primordial black holes from conformal weight transitions
• Nonminimal Couplings and the Forgotten Field of Axion Inflation
• Inflationary perturbations with Lifshitz scaling
• M-flation and its spectators
• The adiabatic/entropy decomposition in $P({\varphi }^I,X^{IJ})$ theories with multiple sound speeds
• How much will we learn from the CMB ?
• Forecasting isocurvature models with CMB lensing information: axion and curvaton scenarios
• The hand-made tail: Non-perturbative tails from multifield inflation
• The shape of high order correlation functions in CMB anisotropy maps
• Multiple Peaks in the CMB
• Cosmological Singularities in Brane Gravity
• On the four-dimensional effective theories in brane-worlds
• Inflation: a quantum laboratory on cosmological scales
• Infrared Sensitivity of Cosmological Probes in Horndeski Theory
• Slow-roll corrections in multi-field inflation: a separate universes approach
• Slow-roll Analysis of Double Field Axion Inflation
• Primordial black holes with anisotropic hair
• Scalar-Induced Gravitational Waves in Palatini $f(R)$ Gravity
• Inflation in a scalar-vector gravity theory
• The $R^2$-Higgs inflation with two Higgs doublets
• Non-Gaussianity from explicit $U(1)$-breaking interactions
• Cosmological perturbation theory with trinity of scalar fields
• Wronskian Formulation of the Spectrum of Curvature Perturbations
• Non-Gaussianity in Cosmology: from Inflation to the CMB
• Early Universe: inflation and cosmological perturbations
• Ultra slow-turn inflation
• Conformal invariant cosmological perturbations via the covariant approach: multicomponent universe
• Construction and applications of the manifestly gauge invariant expressions of the solutions of the cosmological perturbation theory