Generating the curvature perturbation without an inflaton

Abstract

We present a mechanism for the origin of the large-scale curvature perturbation in our Universe by the late decay of a massive scalar field, the curvaton. The curvaton is light during a period of cosmological inflation, when it acquires a perturbation with an almost scale-invariant spectrum. This corresponds initially to an isocurvature density perturbation, which generates the curvature perturbation after inflation when the curvaton density becomes a significant fraction of the total. The isocurvature density perturbation disappears if the curvaton completely decays into thermalised radiation. Any residual isocurvature perturbation is 100% correlated with the curvature. The same mechanism can also generate the curvature perturbation in pre big bang/ekpyrotic models, provided that the curvaton has a suitable non-canonical kinetic term so as to generate a flat spectrum.

8 pages, minor corrections, reference added

Cited by in corpus (1084)

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• Isocurvature modes in the CMB bispectrum
• Primordial Non-Gaussianity in Models with Dark Matter Isocurvature Fluctuations
• Cosmological density perturbations from conformal scalar field: infrared properties and statistical anisotropy
• The inflating curvaton
• Radion Cosmology in Theories with Universal Extra Dimensions
• Non-Gaussianity from Isocurvature Perturbations : Analysis of Trispectrum
• The masses of weakly-coupled scalar fields in the early Universe
• Consistency Relations for Non-Gaussianity
• Contribution of the hybrid inflation waterfall to the primordial curvature perturbation
• Inflation with an extra light scalar field after Planck
• Sneutrino condensate source for density perturbations, leptogenesis and low reheat temperature
• Cosmological perturbations for an inflaton field coupled to radiation
• Effect of Background Evolution on the Curvaton Non-Gaussianity
• The integrated bispectrum as a test of CMB non-Gaussianity: detection power and limits on f_NL with WMAP data
• Curvaton field and intermediate inflationary universe model
• Primordial non-Gaussianities and zero bias tracers of the Large Scale Structure
• Generating the curvature perturbation with instant preheating
• Statistical Anisotropy and the Vector Curvaton Paradigm
• Curvaton paradigm can accommodate multiple low inflation scales
• CMB lensing extraction and primordial non-Gaussianity
• Observable gravitational waves in pre-big bang cosmology: an update
• Baryogenesis and Gravitino Dark Matter in Gauge-Mediated Supersymmetry-Breaking Models
• Non-Gaussianity from Axionic Curvaton
• The CMB Bispectrum, Trispectrum, non-Gaussianity, and the Cramer-Rao Bound
• Inflation Model Selection meets Dark Radiation
• Old Inflation in String Theory
• Superhorizon curvaton amplitude in inflation and pre-big bang cosmology
• Mixed Non-Gaussianity from Axion-Gauge Field Dynamics
• Growth of curvature perturbations for PBH formation \& detectable GWs in non-minimal curvaton scenario revisited
• Modulated Inflation
• New Constraints on the running-mass inflation model
• Supercurvaton
• Cosmology of the Spinor Emergent Universe and Scale-invariant Perturbations
• Detecting higher spin fields through statistical anisotropy in the CMB bispectrum
• A grounded perspective on New Early Dark Energy using ACT, SPT, and BICEP/Keck
• Non-Gaussianity in braneworld and tachyon inflation
• Supersymmetric Curvatons and Phase-Induced Curvaton Fluctuations
• Dumping inflaton energy density out of this world
• Hunting for Isocurvature Modes in the CMB non-Gaussianities
• Cosmological Perturbations from the Standard Model Higgs
• Cosmological Perturbations Across an S-brane
• General conditions for scale-invariant perturbations in an expanding universe
• Probing correlated compensated isocurvature perturbations using scale-dependent galaxy bias
• Optimal constraint on g_NL from CMB
• Preheating after Small-Field Inflation
• Large Nonlocal Non-Gaussianity from a Curvaton Brane
• Reheating and gravitino production in braneworld inflation
• Quantum corrections to scalar field dynamics in a slow-roll space-time
• Constraining Curvatonic Reheating
• Construction of nonsingular cosmological solutions in string theories
• Curvaton Decay by Resonant Production of the Standard Model Higgs
• A Supersymmetric Standard Model of Inflation with Extra Dimensions
• Modulated curvaton decay
• Exploring KSZ velocity reconstruction with $N$-body simulations and the halo model
• Stochastic Background of Gravitational Waves from Fermions
• Hybrid Dark Sector: Locked Quintessence and Dark Matter
• Non-Gaussianities in extended D-term inflation
• Gaugid inflation
• Non-Gaussianity and Gravitational Waves from Quadratic and Self-interacting Curvaton
• Breaking the scale invariance of the primordial power spectrum in Horava-Lifshitz Cosmology
• Signatures of Primordial Non-Gaussianity in the Large-Scale Structure of the Universe
• The next non-Gaussianity frontier: what can a measurement with $\sigma (f_{\mathrm{NL}})\lesssim 1$ tell us about multifield inflation?
• Modular inflation and the orthogonal axion as curvaton
• Leptogenesis from a sneutrino condensate revisited
• Scenarios of modulated perturbations
• Trapped Quintessential Inflation in the context of Flux Compactifications
• The squeezed limit of the bispectrum in multi-field inflation
• On the linear term correction for needlets/wavelets non-Gaussianity estimators
• New universal property of cosmological gravitational wave anisotropies
• Constraints on anisotropic primordial non-Gaussianity from intrinsic alignments of SDSS-III BOSS galaxies
• Cosmological perturbations from inhomogeneous preheating and multi-field trapping
• Statistical Anisotropy from Vector Curvaton in D-brane Inflation
• Probing CMB Non-Gaussianity Using Local Curvature
• High-Scale Axions without Isocurvature from Inflationary Dynamics
• "Graceful" Old Inflation
• Isocurvature modes and Baryon Acoustic Oscillations
• Non-Gaussianity, Isocurvature Perturbation, Gravitational Waves and a No-Go Theorem for Isocurvaton
• Manyfield Inflation in Random Potentials
• Cosmic variance in inflation with two light scalars
• Non-thermal production of Dark Matter after Inflation
• Non-Gaussian Signatures in the five-year WMAP data as identified with isotropic scaling indices
• Scale-Invariant Fluctuations from Galilean Genesis
• A Study of Structure Formation and Reheating in the D3/D7 Brane Inflation Model
• Visible sector inflation and the right thermal history in light of Planck data
• Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
• Gravitational waves from a curvaton model with blue spectrum
• Hybrid Inflation without Flat Directions and without Primordial Black Holes
• Multi-disformal invariance of nonlinear primordial perturbations
• A model for fluctuating inflaton coupling: (s)neutrino induced adiabatic perturbations and non-thermal leptogenesis
• Systematics of multi-field effects at the end of warped brane inflation
• Toward inflation models compatible with the no-boundary proposal
• Scalar perturbations in conformal rolling scenario with intermediate stage
• Curvaton reheating in tachyonic braneworld inflation
• Scale-invariant Perturbations from Chaotic Inflation
• The scale of gravity and the cosmological constant within a landscape
• Primordial black holes from a curvaton scenario with strongly non-Gaussian perturbations
• Spillway Preheating
• General analytic predictions of two-field inflation and perturbative reheating
• Curvature Perturbations from a Massive Vector Curvaton
• On the Initial State and Consistency Relations
• Curvaton in large field inflation
• Density Perturbations from Modulated Decay of the Curvaton
• Future constraints on neutrino isocurvature perturbations in the curvaton scenario
• Two scalar fields inflation from scale-invariant gravity with modified measure
• Tachyon Field in Intermediate Inflation on the Brane
• Relativistic effects and primordial non-Gaussianity in the galaxy bias
• General solution for scalar perturbations in bouncing cosmologies
• Elliptic Inflation: Generating the curvature perturbation without slow-roll
• Inflation at the TeV scale with a PNGB curvaton
• Conformal frames in cosmology
• End of multi-field inflation and the perturbation spectrum
• Hilltop Curvatons
• Planck constraints on Higgs modulated reheating of renormalization group improved inflation
• Inhomogeneous non-Gaussianity
• The Higgs field and early universe cosmology: a (brief) review
• The effects of Non-Gaussian initial conditions on the structure and substructure of Cold Dark Matter halos
• Curvaton with Nonminimal Derivative Coupling to Gravity II: Full Perturbation Analysis
• Can MSSM Particle be the Inflaton?
• Viable Vector Coherent Oscillation Dark Matter
• The WMAP normalization of inflationary cosmologies
• Isocurvature perturbations in extra radiation
• Non-Gaussianities from the Standard Model Higgs
• Brane inflation without slow-roll
• Measuring the duration of inflation with the curvaton
• Detectable primordial non-gaussianities and gravitational waves in k-inflation
• Detecting Dark Matter Substructures on Small Scales with Fast Radio Bursts
• Dark Radiation from Modulated Reheating
• The Spectral Index and its Running in Axionic Curvaton
• Non-Gaussianity from Self-Ordering Scalar Fields
• Constraining SUSY with Heavy Scalars -- using the CMB
• Differentiating CDM and Baryon Isocurvature Models with 21 cm Fluctuations
• Baryon Asymmetry in a Heavy Moduli Scenario
• Effective gravitational interactions of dark matter axions
• Taming the Runaway Problem of Inflationary Landscapes
• Lectures on Reheating after Inflation
• Production of Topological Defects at the End of Inflation
• Spectral Index in Curvaton Scenario
• Impact of Uncertainties in the Cosmological Parameters on the Measurement of Primordial non-Gaussianity
• Neutralino Dark Matter and the Curvaton
• Can Standard Model Higgs Seed the Formation of Structures in Our Universe?
• Optimizing future experimental probes of inflation
• Non-Gaussian Mode Coupling and the Statistical Cosmological Principle
• Cosmological Avatars of the Landscape I: Bracketing the SUSY Breaking Scale
• Evading the Lyth Bound in Hybrid Natural Inflation
• Conformal Symmetries of FRW Accelerating Cosmologies
• Isocurvature modes and Baryon Acoustic Oscillations II: gains from combining CMB and Large Scale Structure
• Different reheating mechanisms in quintessence inflation
• Inflation Compactification from Dynamical space time
• Correlating CMB Spectral Distortions with Temperature: what do we learn on Inflation?
• Scale-free primordial cosmology
• On the Equivalence of Barrier Crossing, Peak-Background Split, and Local Biasing
• Quantum Corrections to Inflaton and Curvaton Dynamics
• G-Curvaton
• The trispectrum in ghost inflation
• Density Fluctuations in Thermal Inflation and Non-Gaussianity
• String-inspired cosmology
• Production of topological defects at the end of inflation
• Conditions for a Successful Right-Handed Majorana Sneutrino Curvaton
• Post-inflationary behavior of adiabatic perturbations and tensor-to-scalar ratio
• Tensor Spectra Templates for Axion-Gauge Fields Dynamics during Inflation
• Non-minimally coupled curvaton
• Non-Gaussianity from Lifshitz Scalar
• Local non-Gaussianity from rapidly varying sound speeds
• Relaxing inflation models with non-minimal coupling: A general study
• 21 cm Angular Power Spectrum from Minihalos as a Probe of Primordial Spectral Runnings
• Curvaton scenario with low scale inflation revisited
• A model for the very early Universe
• On inflation, cosmological constant, and SUSY breaking
• Dark Matter Microhalos in the Solar Neighborhood: Pulsar Timing Signatures of Early Matter Domination
• Anisotropies in Scalar-Induced Gravitational-Wave Background from Inflaton-Curvaton Mixed Scenario with Sound Speed Resonance
• Fluctuating annihilation cross sections and the generation of density perturbations
• Sneutrino condensate as a candidate for the hot big bang cosmology
• Evolution of the curvature perturbation during and after multi-field inflation
• New Early Dark Energy as a solution to the $H_0$ and $S_8$ tensions
• Inflationary Predictions and Moduli Masses
• Quasi-isotropic solution of the Einstein equations near a cosmological singularity for a two-fluid cosmological model
• An Effective Cosmological Collider
• Diraxiogenesis
• Primordial Trispectrum from Isocurvature Fluctuations
• Asymmetric Dark Matter and Baryogenesis from Pseudoscalar Inflation
• DBI Galileon in the Effective Field Theory of Inflation: Orthogonal non-Gaussianities and constraints from the Trispectrum
• On the Amount of Gravitational Waves from Inflation
• The curvaton as a Bose-Einstein condensate of chiral pseudo Nambu-Goldstone bosons
• No-boundary measure and preference for large e-foldings in multi-field inflation
• Higher Order Corrections to the Primordial Gravitational Wave Spectrum and its Impact on Parameter Estimates for Inflation
• Feynman-like Rules for Calculating n-Point Correlators of the Primordial Curvature Perturbation
• The Amplitude of Dark Energy Perturbations
• Finite volume effects for non-Gaussian multi-field inflationary models
• Rotating a Curvaton Brane in a Warped Throat
• The Classical Stability Of The Ghost Condensate
• The Probability Distribution for Non-Gaussianity Estimators
• Tachyon Mediated Non-Gaussianity
• Enlarging the parameter space of standard hybrid inflation
• Squeezing $f_{\mathrm{NL}}$ out of the matter bispectrum with consistency relations
• NO Curvatons or Hybrid Quintessential Inflation
• Fermionic Isocurvature Perturbations
• Stochastic evolution of scalar fields with continuous symmetries during inflation
• Non-Gaussianity in multiple three-form field inflation
• Unraveling Cosmological Anisotropies within Stochastic Gravitational Wave Backgrounds
• The minimal curvaton-higgs model
• Compensation for large tensor modes with iso-curvature perturbations in CMB anisotropies
• Multiple scalar particle decay and perturbation generation
• Primordial curvature perturbation during and at the end of multi-field inflation
• Non-Gaussianity in three fluid curvaton model
• Is Trans-Planckian Censorship a Swampland Conjecture?
• What is needed of a scalar field if it is to unify inflation and late time acceleration ?
• Primordial black holes from temporally enhanced curvature perturbation
• The hybrid curvaton
• Large-scale anomalies of the CMB in the curvaton scenario
• From the production of primordial perturbations to the end of inflation
• Mixed Inflaton and Spectator Field Models after Planck
• The primordial black hole from running curvaton
• Small cosmological constant from a peculiar inflaton potential
• Scale-dependent CMB asymmetry from primordial configuration
• Lensing Bias to CMB Measurements of Compensated Isocurvature Perturbations
• Generating curvature perturbations with or without MSSM flat directions
• Rescuing Quadratic Inflation
• Implications of Planck results for models with local type non-Gaussianity
• Primordial Black Hole Formation in Non-Standard Post-Inflationary Epochs
• Constraints on moduli cosmology from the production of dark matter and baryon isocurvature fluctuations
• Gravitational Atoms
• Curvaton Scenario with Affleck-Dine Baryogenesis
• Production of non-gaussianities in a bouncing phase
• Testing Multi-Field Inflation with Galaxy Bias
• Extended Curvaton reheating in inflationary models
• Perturbations of Single-field Inflation in Modified Gravity Theory
• Chaotic inflation with curvaton induced running
• Evolution of the curvature perturbations during warm inflation
• Sourcing curvature modes with entropy perturbations in non-singular bouncing cosmologies
• Scalar Perturbations Through Cycles
• Curvaton reheating mechanism in inflation on warped Dvali-Gabadadze-Porrati brane
• Curvature and Entropy Perturbations in Generalized Gravity
• Negative Energy Cosmology and the Cosmological Constant
• Temporal enhancement of super-horizon curvature perturbations from decays of two curvatons and its cosmological consequences
• Non-Gaussianity from Attractor Curvaton
• Spectator field models in light of spectral index after Planck
• Suppressing Super-Horizon Curvature Perturbations?
• Kinetic Gravity Braiding and axion inflation
• Leptogenesis as the source of gravitino dark matter and density perturbations
• Numerical study of inflationary preheating with arbitrary power-law potential and a realization of curvaton mechanism
• Primordial black holes: constraints, potential evidence and prospects
• Decay of Scalar Condensation in Quantum Field Theory
• Probing Compensated Isocurvature with the 21-cm Signal during Cosmic Dawn
• Eliminating the eta-problem in SUGRA Hybrid Inflation with Vector Backreaction
• Inhomogeneous reheating scenario with low scale inflation and/or MSSM flat directions
• Gravitino Dark Matter and Non-Gaussianity
• Non-Gaussianity of a single scalar field in general covariant Hořava-Lifshitz gravity
• Effect of reheating on predictions following multiple-field inflation
• Isocurvature perturbations and tensor mode in light of Planck and BICEP2
• Standard model Higgs field and hidden sector cosmology
• Enhanced reheating via Bose condensates
• The curvaton scenario in the MSSM and predictions for non-Gaussianity
• Non-Gaussianity in the inflating curvaton
• Curvaton reheating in a Scale Invariant Two Measures Theory
• Spotted Inflation
• Tracking Curvaton(s)?
• Chaotic inflation in supergravity and cosmic string production
• Non-Gaussianity and constraints for the variance of perturbations in the curvaton model
• Effects of Light Fields During Inflation
• Primordial Bispectrum and Trispectrum Contributions to the Non-Gaussian Excursion Set Halo Mass Function with Diffusive Drifting Barrier
• Foreground influence on primordial non-Gaussianity estimates: needlet analysis of WMAP 5-year data
• Statistics of general functions of a Gaussian field -application to non-Gaussianity from preheating-
• Reheating in tachyonic inflationary models: Effects on the large scale curvature perturbations
• Curvatons in the minimally supersymmetric standard model
• Strongly scale-dependent CMB dipolar asymmetry from super-curvature fluctuations
• The probability distribution for non-Gaussianity estimators constructed from the CMB trispectrum
• Constraining the WMAP9 bispectrum and trispectrum with needlets
• Strong dynamics at the Planck scale as a solution to the cosmological moduli problem
• Curvature Perturbation from Supersymmetric Flat Directions
• Quantum Weyl Invariance and Cosmology
• Delta-N formalism for the evolution of the curvature perturbations in generalized multi-field inflation
• Low Scale Inflation at High Energy Colliders and Meson Factories
• Position Space CMB Anomalies from Multi-Stream Inflation
• Violation of slow-roll in non-minimal inflation
• Hybrid Curvatons from Broken Symmetry
• Fundamental Uncertainty in the BAO Scale from Isocurvature Modes
• Influence of Reheating on the Trispectrum and its Scale Dependence
• The Irrelevance of Primordial Black Hole Clustering in the LVK mass range
• Measuring ultra-large scale effects in the presence of 21cm intensity mapping foregrounds
• Modulated decay in the multi-component Universe
• "Phantom" Inflation in Warped Compactification
• Entropy Fluctuations in Brane Inflation Models
• CMB and matter power spectra from cross correlations of primordial curvature and magnetic fields
• Modular thermal inflation without slow-roll approximation
• On the possibility of braneworld quintessential inflation
• Narrowing the window of inflationary magnetogenesis
• Cosmologies from higher-order string corrections
• Curvatons in Warped Throats
• Probing a panoply of curvaton-decay scenarios using CMB data
• Nonlinear superhorizon perturbations of non-canonical scalar field
• The lessons from the running of the tensor-to-scalar ratio
• Gravitational Waves From Dark Sectors, Oscillating Inflatons, and Mass Boosted Dark Matter
• Running spectral index from shooting-star moduli
• Remote Inflation: Hybrid-like inflation without hybrid-type potential
• Cosmological constraints on the curvaton web parameters
• Non-Oscillatory No-Scale Inflation
• Hubble-induced mass from MSSM plasma
• Mixed inflaton and curvaton scenario with sneutrinos
• Cosmology with the Square Kilometre Array by SKA-Japan
• Extended analysis of CMB constraints on non-Gaussianity in isocurvature perturbations
• Inflaton or Curvaton? Constraints on Bimodal Primordial Spectra from Mixed Perturbations
• Curvaton Dynamics in Brane-worlds
• Spinflation with Angular Potentials
• Revisiting non-Gaussianity of multiple-field inflation from the field equation
• Super cosmic variance from mode-coupling: A worked example
• Gravitational-wave background in bouncing models from semi-classical, quantum and string gravity
• From heaviness to lightness during inflation
• Exploring Two-Field Inflation in the Wess-Zumino Model
• Anisotropic Massive Gauge-flation
• A new bound on the low reheating temperature with dark matter
• Power law inflation with a non-minimally coupled scalar field in light of Planck and BICEP2 data: The exact versus slow roll results
• Bayesian evidence of the post-Planck curvaton
• Instant preheating in a scale invariant two measures theory
• Curvaton and the inhomogeneous end of inflation
• Identifying the inflaton with primordial gravitational waves
• Completing magnetic field generation from gravitationally coupled electrodynamics with the curvaton mechanism
• Wigner-Eckart theorem in cosmology: Bispectra for total-angular-momentum waves
• Gravitational Particle Production in Loop Quantum Cosmology
• How the curvaton scenario, modulated reheating and an inhomogeneous end of inflation are related
• Remarks on Hubble Induced Mass from Fermion Kinetic Term
• Multiple spectator condensates from inflation
• Probing new physics with multi-vacua quantum tunnelings beyond standard model through gravitational waves
• Modulated reheating by curvaton
• Curvaton Dynamics Revisited
• Non-Gaussianity with Lagrange Multiplier Field in the Curvaton Scenario
• Higgs Boson in RG running Inflationary Cosmology
• Evolution of curvature perturbation in generalized gravity theories
• What Planck does not tell us about inflation
• Low scale inflation and the immediate heavy curvaton decay
• Stochastic inflation and primordial black holes
• Timelike Vector Field Dynamics in the Early Universe
• Modulated inflation from kinetic term
• Mixed non-Gaussianity in multiple-DBI inflation
• Modulated preheating and isocurvature perturbations
• Squeezing the Axion
• Non-Gaussianity from false vacuum inflation: Old curvaton scenario
• Heavy Particles from Inflation
• Electrically charged curvaton
• Primordial Black Holes from Pre-Big Bang inflation
• Cosmological data and indications for new physics
• The sensitivity of BAO Dark Energy Constraints to General Isocurvature Perturbations
• Primordial black holes as cosmic expansion accelerators
• Coupling structure of multi-field primordial perturbations
• Remote Inflation as hybrid-like sneutrino/MSSM inflation
• Curvaton model completed
• Modification of the halo mass function by kurtosis associated with primordial non-Gaussianity
• CMB spectral distortions in generic two-field models
• Computing First-Passage Times with the Functional Renormalisation Group
• Constraints on primordial non-Gaussianity from WMAP7 and Luminous Red Galaxies power spectrum and forecast for future surveys
• Effective Search Templates for a Primordial Stochastic Gravitational Wave Background
• Scale-dependent CMB power asymmetry from primordial speed of sound and a generalized $\delta$N formalism
• New features in curvaton model
• Reheating mechanism of Curvaton with Nonminimal Derivative Coupling to Gravity
• Non-Gaussianity and gravitational wave background in curvaton with a double well potential
• Constraints on the production of primordial magnetic seeds in pre-big bang cosmology
• The Revival of Cosmic Strings
• Opening up a window on the postinflationary QCD axion
• Sneutrinos as Mixed Inflaton and Curvaton
• Fully non-linear equivalence of delta N and covariant formalisms
• Right-handed neutrinos as the source of density perturbations
• Structure Formation with Two Periods of Inflation: Beyond PLaIn $\Lambda$CDM
• Cosmic Super-Strings and Kaluza-Klein Modes
• Non-Gaussianity in rapid-turn multi-field inflation
• Hemispherical Power Asymmetry of the Cosmic Microwave Background from a Remnant of a pre-Inflationary Topological Defect
• Curvaton Decay into Baryons, anti-Baryons and Radiation
• Particle Production during Inflation in Light of PLANCK
• Quantum collapse as source of the seeds of cosmic structure during the radiation era
• Cosmic Degeneracies III: N-body Simulations of Interacting Dark Energy with Non-Gaussian Initial Conditions
• Constraints from CMB in the intermediate Brans-Dicke inflation
• Effect of intermediate Minkowskian evolution on CMB bispectrum
• Minimal solution to the axion isocurvature problem from a nonminimal coupling
• New developments on embedding inflation in gauge theory and particle physics
• Cosmic Perturbations from a Rotating Field
• Eternal Universes
• Relaxation leptogenesis, isocurvature perturbations, and the cosmic infrared background
• Holomorphic Bisectional Curvatures, Supersymmetry Breaking, and Affleck-Dine Baryogenesis
• Quintessential Isocurvature in Separate Universe Simulations
• Light cold dark matter from non-thermal decay
• CDM/baryon isocurvature perturbations in a sneutrino curvaton model
• Large Tensor-to-Scalar Ratio in Small-Field Inflation
• Alchemical Inflation: inflaton turns into Higgs
• Dynamics of Cosmological Perturbations in Multi-Speed Inflation
• Radiative Corrections from Heavy Fast-Roll Fields during Inflation
• An improved estimator for non-Gaussianity in cosmic microwave background observations
• BICEP2, the curvature perturbation and supersymmetry
• Preheating in an Asymptotically Safe Quantum Field Theory
• Cosmological Constraints on Rapid Roll Inflation
• Non-Gaussianity in two-field inflation beyond the slow-roll approximation
• Statistical nature of non-Gaussianity from cubic order primordial perturbations: CMB map simulations and genus statistic
• Towards conformal cosmology
• Spectral Index and Non-Gaussianity in Supersymmetric Hybrid Inflation
• Suppressed Non-Gaussianity in the Curvaton Model
• Statistics of the excursion sets in models with local primordial non-Gaussianity
• Planck constraints on neutrino isocurvature density perturbations
• Gravity and non-gravity mediated couplings in multiple-field inflation
• A falsely fat curvaton with an observable running of the spectral tilt
• Isocurvature Fluctuations Induce Early Star Formation
• Primordial non-Gaussianity as a probe of seesaw and leptogenesis
• The Origin of the Large-Scale Structure in the Universe: Theoretical and Statistical Aspects
• Conformal Universe as false vacuum decay
• Hubble induced mass after inflation in spectator field models
• Spontaneous Baryogenesis without Baryon Isocurvature
• Curvaton Potential Terms, Scale-Dependent Perturbation Spectra and Chaotic Initial Conditions
• The end of locked inflation
• Smallness of Baryon Asymmetry from Split Supersymmetry
• Inflationary parameters and primordial perturbation spectra
• Multi-chaotic inflation with and without spectator field
• Towards a warped inflationary brane scanning
• Generically large nongaussianity in small multifield inflation
• Non-perturbative $\delta N$
• Revised $f_{\mathrm{NL}}$ parameter in Curvaton Scenario
• On the initial regime of pre-big bang cosmology
• Cosmological perturbations from a Spectator field during inflation
• Nambu-Goldstone Affleck-Dine Baryogenesis
• Generation of perturbation after multi-field inflation
• Curvature Perturbation and Domain Wall Formation with Pseudo Scaling Scalar Dynamics
• Generating cosmological perturbations with mass variations
• Curvaton scenarios with inflaton decays into curvatons
• Curvaton as dark matter with secondary inflation
• Correlated curvature perturbations and magnetogenesis from the GUT gauge bosons
• Interpreting Pulsar Timing Array data of Gravitational Waves with Ekpyrosis-Bouncing Cosmology
• Creating perturbations from a decaying field during inflation
• The TeV-mass curvaton
• Curvatons and inhomogeneous scenarios with deviation from slow-roll
• Resolving primordial physics through correlated signatures
• A forecast for the detection of the power asymmetry from galaxy surveys
• Covariant second-order perturbations in generalized two-field inflation
• Inflationary Solution to the Strong CP and $\mu$ Problems
• Liberating the Inflaton from Primordial Spectrum Constraints
• Thermal blocking of preheating
• Dependence of the amplitude of gravitational waves from preheating on the inflationary energy scale
• Axionlike Origin of the Primordial Density Perturbation
• Braneworld Flux Inflation
• Curvaton preheating revisited
• Constraints on the Pre-Big Bang scenario from a cosmological interpretation of the NANOGrav data
• Refined Study of Isocurvature Fluctuations in the Curvaton Scenario
• From Swampland to Phenomenology and Back
• Isocurvature modes: joint analysis of the CMB power spectrum and bispectrum
• Isocurvature initial conditions for second order Boltzmann solvers
• Higher moments of primordial non-Gaussianity and N-body simulations
• I-ball formation with logarithmic potential
• Large Scale Cosmic Perturbation from Evaporation of Primordial Black Holes
• Curvaton reheating in non-minimal derivative coupling to gravity: NO models
• Consequences of a stochastic approach to the conformal invariance of inflationary correlators
• A primer on the ekpyrotic scenario
• Thermal Effects and Sudden Decay Approximation in the Curvaton Scenario
• Cosmological Perturbations: Vorticity, Isocurvature and Magnetic Fields
• What We Can Learn from the Running of the Spectral Index if no Tensors are Detected in the Cosmic Microwave Background Anisotropy
• A new perspective on supersymmetric inflation
• Double inflation via non-minimally coupled spectator
• Testing Inflation: A Bootstrap Approach
• Affleck-Dine baryogenesis with modulated reheating
• Mimetic Curvaton
• Density perturbations from both the inflaton and the curvaton
• Radiative corrections to scalar masses in de Sitter space
• Cosmological Perturbations During Radion Stabilization
• Candidates for Inflaton in Quiver Gauge Theory
• Supersymmetric Models For Gauge Inflation
• The running curvaton
• Cosmic perturbations, baryon asymmetry and dark matter from the minimal supersymmetric standard model
• Can Horndeski Genesis be Nonpathological?
• Inflationary Dynamics with Runaway Potentials
• Implications for Pulsar Timing Arrays of Sub-solar Black Hole Detections: From LVK to Einstein Telescope and Cosmic Explorer
• Inflation as de Sitter instability
• Metric fluctuations and its evolution during inflation
• Entropic mechanisms with generalized scalar fields in the Ekpyrotic universe
• Particle physics model of curvaton inflation in a stable universe
• Lensing Bias to CMB Polarization Measurements of Compensated Isocurvature Perturbations
• Entropy production and curvature perturbation from dissipative curvatons
• The Effect of Curvaton Decay on the Primordial Power Spectrum
• Lecture notes on non-Gaussianity
• Adiabatic and non-adiabatic perturbations for loop quantum cosmology
• Phenomenology of a vector-field-induced (and possibly parity breaking) compensated isocurvature perturbation
• The curvaton scenario in Brane cosmology: model parameters and their constraints
• Axion-CMB Scenario in Supercooled Universe
• Non-Gaussianity in String Cosmology: A Case Study
• Conformal Inflation, Modulated Reheating, and WMAP5
• The quantum cosmological tilt and the origin of dark matter
• Delta-N Formalism for Curvaton with Modulated Decay
• Affleck-Dine baryogenesis in inflating curvaton scenario with O($10-10^2$TeV) mass moduli curvaton
• Aspects of warm-flat directions
• Preheating and locked inflation: an analytic approach towards parametric resonance
• Theories of gravity with nonminimal matter-curvature coupling and the de Sitter swampland conjectures
• Gravitational waves from two scalar fields unifying the dark sector with inflation
• Higgs-like spectator field as the origin of structure
• Curvaton and quantum gravity effect on the tensor to scalar ratio of the chaotic inflation
• Primordial black holes from the ultraslow-roll phase in the inflaton--curvaton mixed field inflation
• Cosmic Microwave Background Dipole Asymmetry could be explained by Axion Monodromy Cosmic Strings
• Non-gaussianity and Statistical Anisotropy in Cosmological Inflationary Models
• A model of cosmology and particle physics at an intermediate scale
• Broken scale invariance, $\alpha$-attractors and vector impurity
• The R-axion and non-Gaussianity
• Holographic complexity growth for a charged AdS-dilaton black holes with fixed and dynamical boundary respectively
• Consistency relation for the Lorentz invariant single-field inflation
• On Primordial Perturbations of Test Scalar Fields
• Gravitational waves induced by matter isocurvature in general cosmologies
• CMB Fluctuations and String Compactification Scales
• Non-Gaussianity from two right-handed sneutrino curvaton decays
• Inflation, Large Scale Structure and Particle Physics
• Supersymmetric hybrid inflation with a light scalar
• Curvature perturbation from velocity modulation
• Scale dependences of local form non-Gaussianity parameters from a DBI isocurvature field
• Transitioning from a bounce to $R^2$ inflation
• The quantum origin of cosmic structure: theory and observations
• Cosmic acceleration in models with density dependent moduli
• D-branes and cosmic structure
• Large non-Gaussianity generated after D-term Inflation by Right-Handed Sneutrino Curvaton
• Constrained Superfields in Dynamical Background
• Mixed perturbations from an Inflaton and Two Curvatons - towards understanding non-gaussianity in more complicated curvaton scenarios
• Compactification driven Hilltop Inflation in Einstein-Yang-Mills
• Spectral index and running of $g_{NL}$ from an isocurvature scalar field
• CMB lensing forecasts for constraining the primordial perturbations: adding to the CMB temperature and polarization information
• SuperCool Inflation: A Graceful Exit from Eternal Inflation at LHC Scales and Below
• $g_{\mathrm{NL}}$ in the curvaton model constrained by PLANCK
• Curvaton mechanism after multi-field inflation
• f(R) in Holographic and Agegraphic Dark Energy Models and the Generalized Uncertainty Principle
• Reheating dynamics affects non-perturbative decay of spectator fields
• Thermodynamic gauge-theory cascade
• Quantifying the 'naturalness' of the curvaton model
• Nonlinear Perturbations in a Variable Speed of Light Cosmology
• Gauged Inflation
• Lectures on Naturalness, String Landscape and Multiverse
• Warm Ekpyrosis
• Thermal Inflation with a Thermal Waterfall Scalar Field Coupled to a Light Spectator Scalar Field
• Warm constant-roll inflation in brane-world cosmology
• Primordial black holes from a curvaton: the role of bimodal distributions
• Escape from the swamp with spectator
• Right-Handed Sneutrino Curvaton and non-Gaussianity
• Possible origin of CMB temperature fluctuations: Vacuum fluctuations of Kaluza-Klein and string states during inflationary era
• Enlarging the Space of Viable Inflation Models: A Slingshot Mechanism
• Suppression of the large scale curvature perturbation by interacting fluids
• String Loop Moduli Stabilisation and Cosmology in IIB Flux Compactifications
• Viable Curvaton Models from the $f_{NL}$ Parameter
• Scalar-induced gravitational waves including isocurvature perturbations with lattice simulations
• Cosmological correlation functions in scalar and vector inflationary models
• Quenching preheating by light fields
• Constraints on the three-fluid model of curvaton decay
• Application of beyond $\delta N$ formalism -- Varying sound speed
• Where does curvaton reside? Differences between bulk and brane frames
• QCD Axions and CMB Anisotropy
• Curvaton decay into relativistic matter
• The interplay between high energy physics and cosmology: an example
• Generation of scale invariant density perturbations in a conformally invariant Inert Higgs doublet model
• Stabilising the Planck mass shortly after inflation
• Primordial Black Holes in non-linear perturbation theory
• Flat Direction Dynamics in a Non-Topological Soliton-Dominated Universe
• Tachyon cosmology with non-vanishing minimum potential: a unified model
• The Quantum Phase of Inflation
• Curvaton: Perturbations and reheating
• Inflationary cross-correlations of a non-minimal spectator and their soft limits
• Tilt and Tensor-to-Scalar Ratio in Multi-Scalar Field Inflation: Non-Sum-Separable Case
• Planck isocurvature constraint on primordial black holes lighter than a kiloton
• The shape of high order correlation functions in CMB anisotropy maps
• Anisotropic multiple bounce models
• Curvature perturbations from vacuum transition during inflation
• On the coupling of vector fields to the Gauss-Bonnet invariant
• Non-linear effects in early Universe cosmology
• Mixed Inflaton and Spectator Field Models: CMB constraints and $\mu$ distortion
• Hidden in the background: a local approach to CMB anomalies
• Curvaton mechanism and its implications to sneutrino cosmology
• Curvature perturbations from preheating with scale dependence
• Cosmic Microwave Background anisotropies: the power spectrum and beyond
• Gravity of Cosmological Perturbations in the CMB
• Curvaton reheating and intermediate inflation in brane cosmology
• Forecasting isocurvature models with CMB lensing information: axion and curvaton scenarios
• Pseudo-conformal Universe: late-time contraction and generation of tensor modes
• Probing Dark Matter Isocurvature with Primordial Non-Gaussianity
• Kinematically Blocked Curvaton
• Spin-Torsion, Braneworlds and Changing Symmetry in the Universe
• Higher order non-linear parameters with PLANCK
• On the space of non-Gaussian fields with single-clock bispectra
• Towards an analytic solution of rapid roll inflation with a quartic potential
• Quantum Creation of a Toy Universe without Inflation
• Cosmological perturbation theory with trinity of scalar fields
• Inhomogeneous Reheating Scenario with DBI fields
• Enhancing Bispectrum Estimators for Galaxy Redshift Surveys with Velocities
• Testing Inflationary Cosmology
• Passive Curvaton
• Non-Gaussianity after many-field reheating
• Construction and applications of the manifestly gauge invariant expressions of the solutions of the cosmological perturbation theory
• Non-Gaussianity from explicit $U(1)$-breaking interactions
• Galaxy number-count dipole and superhorizon fluctuations
• Unified Origin of Curvature Perturbation and Baryon Asymmetry of the Universe
• Searching for dark matter isocurvature initial conditions with N-body Simulations
• Sustainability of multi-field inflation and bound on string scale
• Dynamically generated tilt of isocurvature fluctuations
• Non-Gaussianity in Cosmology: from Inflation to the CMB