Warm Little Inflaton

Abstract

We show that inflation can naturally occur at a finite temperature T>H that is sustained by dissipative effects, when the inflaton field corresponds to a pseudo Nambu-Goldstone boson of a broken gauge symmetry. Similarly to "Little Higgs" scenarios for electroweak symmetry breaking, the flatness of the inflaton potential is protected against both quadratic divergences and the leading thermal corrections. We show that, nevertheless, nonlocal dissipative effects are naturally present and are able to sustain a nearly thermal bath of light particles despite the accelerated expansion of the Universe. As an example, we discuss the dynamics of chaotic warm inflation with a quartic potential and show that the associated observational predictions are in very good agreement with the latest Planck results. This model constitutes the first realization of warm inflation requiring only a small number of fields; in particular, the inflaton is directly coupled to just two light fields.

6 pages, 3 figures; to be published as Editors' Suggestion in Physical Review Letters

References in corpus (3)

• Warm Inflation and its Microphysical Basis
• Power spectrum for inflation models with quantum and thermal noises
• Observational implications of mattergenesis during inflation

Cited by in corpus (140)

• Planck 2018 results. X. Constraints on inflation
• Warm inflation as a way out of the swampland
• Thermal Friction as a Solution to the Hubble Tension
• Warm inflation dissipative effects: predictions and constraints from the Planck data
• Minimal Warm Inflation
• Warm Inflation in the light of Swampland Criteria
• Recent developments in warm inflation
• Distance, de Sitter and Trans-Planckian Censorship conjectures: the status quo of Warm Inflation
• Towards a reliable effective field theory of inflation
• Constraining Warm Inflation with CMB data
• Warm brane inflation with an exponential potential: A consistent realization away from the swampland
• Swampland, Axions and Minimal Warm Inflation
• Warm Quintessential Inflation
• Quantifying Scalar Field Dynamics with DESI 2024 Y1 BAO measurements
• A cosmological open quantum system
• The Maximally Symmetric Composite Higgs
• Trans-Planckian censorship and other swampland bothers addressed in warm inflation
• The warm inflation story
• Triple unification of inflation, dark energy, and dark matter in two-scalar-field cosmology
• Dynamical and observational constraints on the Warm Little Inflaton scenario
• Formation of Primordial Black Holes from Warm Inflation
• Primordial Black-Hole Dark Matter via Warm Natural Inflation
• Constraining chameleon field driven warm inflation with Planck 2018 data
• Revisiting CMB constraints on Warm Inflation
• Gravitational wave background from non-Abelian reheating after axion-like inflation
• Gravity Waves and Primordial Black Holes in Scalar Warm Little Inflation
• Warm Little Inflaton becomes Cold Dark Matter
• Observational Constraints on Warm Natural Inflation
• Unified early and late Universe cosmology through dissipative effects in steep quintessential inflation potential models
• Warm Quasi-Single Field Inflation
• Warm (Pseudo)Scalar Inflation
• Warm inflation within a supersymmetric distributed mass model
• Warm Little Inflaton becomes Dark Energy
• Inflation in non-minimal matter-curvature coupling theories
• Warming up cold inflation
• Gravitational wave background from vacuum and thermal fluctuations during axion-like inflation
• WarmSPy: a numerical study of cosmological perturbations in warm inflation
• Reconstructing warm inflation
• A paradigm of warm quintessential inflation and production of relic gravity waves
• Slow-roll inflation in generalized scalar-torsion gravity
• Thermalization in Quenched Open Quantum Cosmology
• Probability of Warm Inflation in Loop Quantum Cosmology
• Thermal Friction as a Solution to the Hubble and Large-Scale Structure Tensions
• Warm Tachyon Inflation and Swampland Criteria
• Warm DBI inflation with constant sound speed
• Identifying Universality in Warm Inflation
• Dynamics of warm power-law plateau inflation with a generalized inflaton decay rate: predicctions and constraints after Planck 2015
• The role of fluctuation-dissipation dynamics in setting initial conditions for inflation
• On the graceful exit problem in warm inflation
• Running and running of the running of the scalar spectral index in warm inflation
• Observational Constraints on Warm Inflation in Loop Quantum Cosmology
• The paradigm of warm quintessential inflation and spontaneous baryogenesis
• Irreversible thermodynamical description of warm inflationary cosmological models
• Adiabatic out-of-equilibrium solutions to the Boltzmann equation in warm inflation
• Study of Goldstone Inflation in the domain of Einstein-Gauss-Bonnet gravity
• Study of warm inflationary models and their parameter estimation from CMB
• Power spectra in warm G-inflation and its consistency: stochastic approach
• On the thermodynamic origin of the initial radiation energy density in warm inflation
• G-Warm inflation
• Axion dark matter from frictional misalignment
• Warm bounce in loop quantum cosmology and the prediction for the duration of inflation
• Nonminimally-coupled warm Higgs inflation: Metric vs. Palatini Formulations
• Dirac-Born-Infeld warm inflation realization in the strong dissipation regime
• Viability of warm inflation with standard model interactions
• Chiral Anomaly in SU(2)${}_R$-Axion Inflation and the New Prediction for Particle Cosmology
• Planck Limits on Non-canonical Generalizations of Large-field Inflation Models
• Warm Inflation, Neutrinos and Dark matter: a minimal extension of the Standard Model
• A generalized method of constraining Warm Inflation with CMB data
• Reheating After Swampland Conjecture
• Gravitational wave from warm inflation
• WI2easy: warm inflation dynamics made easy
• Warm inflation with an oscillatory inflaton in the non-minimal kinetic coupling model
• Dark Matter production during Warm Inflation via Freeze-In
• Inflation with Planck: a survey of some "exotic" inflationary models
• Embedding cosmological inflation, axion dark matter and seesaw mechanism in a 3-3-1 gauge model
• Dynamic analysis of noncanonical warm inflation
• Constraints on the scalar-field potential in warm inflation
• Warm inflation with a heavy QCD axion
• Reexamination of the warm inflation curvature perturbations spectrum
• Non-thermally trapped inflation by tachyonic dark photon production
• Thermal, Trapped and Chromo-Natural Inflation in light of the Swampland Criteria and the Trans-Planckian Censorship Conjecture
• Warm Higgs G-inflation: predictions and constraints from Planck 2015 likelihood
• Warm inflation with non-comoving scalar field and radiation fluid
• Lower tensor to scalar ratio in a SUGRA motivated inflationary potential
• Primordial Black Holes Dark Matter and Secondary Gravitational Waves from Warm Higgs-G Inflation
• Observational Constraints on Two-field Warm Inflation
• Inflationary Dynamics of Mutated Hilltop Inflation in Einstein-Gauss-Bonnet Gravity Under New Slow-Roll Approximations with Generalised Reheating
• Observational constraints on warm quasi-exponential inflation
• Cosmological Constraints on Thermal Friction of Axion Dark Matter
• Inflationary Dynamics in Einstein-Gauss-Bonnet Gravity Using New Slow-Roll Approximations considering Generalised Reheating
• Embedding Ultra slow-roll inflaton dynamics in Warm Inflation
• Warm Higgs-Starobinsky inflation
• Spectra and entropy of multi-field warm inflation
• Holographic warm inflation
• Tachyon warm inflation with the effects of Loop Quantum Cosmology in the light of Planck 2015
• Salvaging Power-Law Inflation through Warming
• Scalar warm inflation in holographic cosmology
• Warming up the Fibres
• Two models unifying warm inflation with dark matter and dark energy
• Two-field Warm Inflation and Its Scalar Perturbations on Large Scales
• Anisotropic warm inflation
• A comparative analysis of dissipation coefficients in warm inflation
• Non-minimal coupled warm inflation with quantum-corrected self-interacting inflaton potential
• G-Warm inflation: Intermediate model
• Warm inflation in general scalar-tensor theory of gravity
• Thermal Gravitons from Warm Inflation
• Dark Matter Freeze-In during Warm Inflation and the Seesaw Mechanism
• Quantum Particle Production Effects on Cosmic Expansion
• Thermal curvature perturbations in thermal inflation
• Non-Gaussianity in the warm k-inflation
• Warm multi natural inflation
• Warm Inflation with Barrow Holographic Dark Energy
• Purely gravitational dark matter production in warm inflation
• Gravitational waves from two scalar fields unifying the dark sector with inflation
• Inflaton as a pseudo-Nambu-Goldstone boson
• Primordial non-Gaussianity in noncanonical warm inflation: three- and four-point correlations
• Stage IV CMB forecasts for warm inflation
• Inflationary Solution of Hamilton Jacobi Equations during Weak Dissipative Regime
• Inflation from a chaotic potential with a step
• Constant-roll warm inflation and the $\beta$-function approach
• Unraveling the Hubble tension with warm inflation
• On the prospects of thermalization of axion-SU(2) inflation
• Thermal effects on warm chromoinflation
• Warm Ekpyrosis
• Warm deformed $R^2$ inflation
• Defying eternal inflation in warm inflation with a negative running
• Freeze-in gravitational waves and dark matter in warm inflation
• Warm Inflation in $f(Q)$ gravity
• ACT DR6 Insights on the Inflationary Attractor models and Reheating
• Gravitational waves from warm inflation in the weak dissipative regime
• On the role of dissipative effects in the quantum gravitational onset of warm Starobinsky inflation in a closed universe
• Non-minimal Higgs inflation in the context of warm scenario in the light of Planck data
• Warm inflation in Weyl geometric gravity
• Warm Inflation Beyond the Markovian Limit
• Primordial non-Gaussianity in noncanonical warm inflation with nonminimal derivative coupling
• $\nu$-Inflaton Dark Matter
• Constraints on polynomial inflation under power-law perturbations
• Scalaron-driven Dark Matter during Warm Inflation via UV Freeze--in
• Dynamics of potential-free warm $\mathbf{k}$-inflation with nonminimal derivative coupling
• Not So Minimal Warm Inflation