Preheating from target space curvature and unitarity violation: Analysis in field space

Abstract

We study particle production and unitarity violation caused by a curved target space right after inflation. We use the inflaton field value instead of cosmic time as the time variable, and derive a semiclassical formula for the spectrum of produced particles. We then derive a simple condition for unitarity violation during preheating, which we confirm by our semiclassical method and numerical solution. This condition depends not only on the target space curvature but also on the height of the inflaton potential at the end of inflation. This condition tells us, for instance, that unitarity is violated in running kinetic inflation and Higgs inflation, while unitarity is conserved in $\alpha$-attractor inflation and Higgs-Palatini inflation.

arXiv comment25 pages, 6 figures; v2: clarifications and references added

References in corpus (69)

• Planck 2018 results. X. Constraints on inflation
• The Standard Model Higgs boson as the inflaton
• Generalized G-inflation: Inflation with the most general second-order field equations
• From k-essence to generalised Galileons
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Universality Class in Conformal Inflation
• Superconformal Inflationary $\alpha$-Attractors
• Higgs inflation: consistency and generalisations
• Cosmological Implications of Dynamical Supersymmetry Breaking
• On the Naturalness of Higgs Inflation
• Power-counting and the Validity of the Classical Approximation During Inflation
• Features of heavy physics in the CMB power spectrum
• Comment on Higgs Inflation and Naturalness
• On Inflation with Non-minimal Coupling
• Inflation with Non-Minimal Coupling: Metric vs. Palatini Formulations
• Non-Thermal Phase Transitions after Inflation
• Scalar perturbations during multiple-field slow-roll inflation
• Superconformal Symmetry, NMSSM, and Inflation
• Preheating with Trilinear Interactions: Tachyonic Resonance
• Induced gravity inflation in the standard model of particle physics
• Perturbations in generalized multi-field inflation
• Unitarizing Higgs Inflation
• The Stokes Phenomenon and Schwinger Vacuum Pair Production in Time-Dependent Laser Pulses
• Higgs-Palatini Inflation and Unitarity
• Axino Mass in Supergravity Models
• Higgs Scalaron Mixed Inflation
• Primordial Bispectrum from Multifield Inflation with Nonminimal Couplings
• Interference Effects in Schwinger Vacuum Pair Production for Time-Dependent Laser Pulses
• A Geometric Formulation of Higgs Effective Field Theory: Measuring the Curvature of Scalar Field Space
• Violent Preheating in Inflation with Nonminimal Coupling
• Running Kinetic Inflation
• Geometrical Destabilization of Inflation
• Cosmological Implications of Radiatively Generated Axion Scale
• Preheating in Palatini Higgs inflation
• Scalaron the healer: removing the strong-coupling in the Higgs- and Higgs-dilaton inflations
• Self-healing of unitarity in effective field theories and the onset of new physics
• A Unitarity-Conserving Higgs Inflation Model
• A covariant approach to general field space metric in multi-field inflation
• Preheating after Multifield Inflation with Nonminimal Couplings, I: Covariant Formalism and Attractor Behavior
• Preheating after Higgs Inflation: Self-Resonance and Gauge boson production
• Linear Inflation from Running Kinetic Term in Supergravity
• Self-healing of unitarity in Higgs inflation
• Preheating after multifield inflation with nonminimal couplings, III: Dynamical spacetime results
• On the violent preheating in the mixed Higgs-$R^2$ inflationary model
• Cosmological implications of supersymmetric axion models
• UV (in)sensitivity of Higgs inflation
• Cosmological Axion Problem in Chaotic Inflationary Universe
• Density perturbations arising from multiple field slow-roll inflation
• Nonlinear Dynamics of Preheating after Multifield Inflation with Nonminimal Couplings
• On the Predictiveness of Single-Field Inflationary Models
• Some like it hot: $R^2$ heals Higgs inflation, but does not cool it
• On preheating in alpha-attractor models of inflation
• Dynamical Emergence of Scalaron in Higgs Inflation
• Hadronic Axion Model in Gauge-Mediated Supersymmetry Breaking and Cosmology of Saxion
• Occurrence of Tachyonic Preheating in the Mixed Higgs-$R^2$ Model
• Light inflaton completing Higgs inflation
• Domain wall and isocurvature perturbation problems in axion models
• Higgs Inflation as Nonlinear Sigma Model and Scalaron as its $\sigma$-meson
• Dilution of Cosmological Densities by Saxino Decay
• Universality and scaling in multi-field $\alpha$-attractor preheating
• Time-Scales for Nonlinear Processes in Preheating after Multifield Inflation with Nonminimal Couplings
• Particle Production after Inflation with Non-minimal Derivative Coupling to Gravity
• Scalar Trapping and Saxion Cosmology
• The universe dominated by oscillating scalar with non-minimal derivative coupling to gravity
• A heatwave affair: mixed Higgs-$R^2$ preheating on the lattice
• On Preheating in Higgs Inflation
• Explosive Axion Production from Saxion
• On adiabatic invariant in generalized Galileon theories
• Testing Two-Field Inflation

Cited by in corpus (13)

• Primordial Black Holes from Multifield Inflation with Nonminimal Couplings
• Planck Constraints and Gravitational Wave Forecasts for Primordial Black Hole Dark Matter Seeded by Multifield Inflation
• On UV-completion of Palatini-Higgs inflation
• Tachyonic Preheating in Plateau Inflation
• Axion Quality Problem Alleviated by Non-Minimal Coupling to Gravity
• Gravitational dynamics in Higgs inflation: Preinflation and preheating with an auxiliary field
• Lepton Flavour Violation Tests of Type II Seesaw Leptogenesis
• Natural Inflation with Exponentially Small Tensor-To-Scalar Ratio
• Axion Quality Problem and Non-Minimal Gravitational Coupling in the Palatini Formulation
• Hybrid metric-Palatini Higgs inflation
• Low-energy probes of small CMB amplitude in models of radiative Higgs mechanism
• Exploring the Landscape of Spontaneous CP Violation in Supersymmetric Theories
• Multi-critical point principle as the origin of classical conformality and its generalizations