Nonequilibrium inflaton dynamics and reheating: Back reaction of parametric particle creation and curved spacetime effects
arXiv:hep-ph/9706207 · doi:10.1103/PhysRevD.56.678 10.1103/PhysRevD.57.3798
Abstract
We present a detailed and systematic analysis of the nonperturbative, nonequilibrium dynamics of a quantum field in the reheating phase of inflatonary cosmology, including full back reactions of the quantum field on the curved spacetime, as well as the fluctuations on the mean field. We use the O(N) field theory with unbroken symmetry in a spatially flat FRW universe to study the dynamics of the inflaton in the post-inflaton, preheating stage. Oscillations of the inflaton's zero mode induce parametric amplification of quantum fluctuations, resulting in a rapid transfer of energy to the inhomogeneous modes of the inflaton field. We adopt the coupled nonperturbative equations for the mean field and variance derived in a preceding paper [gr-qc/9706001] by means of a two-particle-irreducible (2PI), closed-time-path (CTP) effective action for curved spacetime while specialized to leading order in the 1/N expansion. Adiabatic regularization is employed. The renormalized dynamical equations are evolved numerically from initial data which are generic to the end state of slow roll in many inflatonary cosmological scenarios. The initial conditions consist of a large-amplitude, quasiclassical, oscillating mean field, and a variance given by the de Sitter-invariant vacuum. We find that for sufficiently large initial mean-field amplitudes in this model, the parametric resonance effect alone (in a collisionless approximation) is not an efficient means to "preheat" the quantum field. For small initial mean-field amplitude, damping of the mean field via parametric amplification of quantum fluctuations is seen to occur. Our results indicate that the self-consistent dynamics of spacetime plays an important role in determining the physics of the post-inflatonary Universe.
53 pages, 19 figures. The bound on the initial inflaton amplitude has been strengthened (the qualitative results of the paper are unchanged)
References in corpus (2)
Cited by in corpus (60)
- Inflation Dynamics and Reheating
- Warm Inflation and its Microphysical Basis
- Parametric Amplification of Gravitational Fluctuations During Reheating
- Non-linear metric perturbations and production of primordial black holes
- General dissipation coefficient in low-temperature warm inflation
- Decoherence during Inflation: the generation of classical inhomogeneities
- Metric preheating and limitations of linearized gravity
- Quantum corrections to slow roll inflation and new scaling of superhorizon fluctuations
- Massless Metric Preheating
- Nonequilibrium dynamics of fermions in a spatially homogeneous scalar background field
- Quantum corrections to the inflaton potential and the power spectra from superhorizon modes and trace anomalies
- Coarse-Grained Effective Action and Renormalization Group Theory in Semiclassical Gravity and Cosmology
- Lectures on Cosmic Inflation and its Potential Stringy Realizations
- Non-Perturbative Quantum Dynamics of a New Inflation Model
- Stochastic Gravity
- O(N) Quantum fields in curved spacetime
- Inflationary preheating and primordial black holes
- A Simple Method for One-Loop Renormalization in Curved Space-Time
- Non-equilibrium dynamics of a thermal plasma in a gravitational field
- Fate of oscillating scalar fields in the thermal bath and their cosmological implications
- Are black holes over-produced during preheating?
- Early Universe Quantum Processes in BEC Collapse Experiments
- Preheating and the Einstein Field Equations
- Asymptotic Dynamics in Scalar Field Theory: Anomalous Relaxation
- Nonequilibrium inflaton dynamics and reheating. II. Fermion production, noise, and stochasticity
- Defect Formation and Critical Dynamics in the Early Universe
- Hydrodynamic transport functions from quantum kinetic theory
- Can topological defects be formed during preheating ?
- Uniformly Accelerated Charge in a Quantum Field: From Radiation Reaction to Unruh Effect
- Renormalization of nonequilibrium dynamics in FRW cosmology
- The Effective Theory of Inflation in the Standard Model of the Universe and the CMB+LSS data analysis
- On the choice of initial states in nonequilibrium dynamics
- Self consistent estimates of magnetic fields from reheating
- Dynamics and Non-Gaussianity in the Weak-Dissipative Warm Inflation Scenario
- Backreaction in Cosmology
- Quantum corrections to scalar field dynamics in a slow-roll space-time
- Thermalization of an Interacting Quantum Field in the CTP-2PI Next-to-leading-order Large N Scheme
- Decoherence in Field Theory: General Couplings and Slow Quenches
- Renormalization of the nonequilibrium dynamics of fermions in a flat FRW universe
- Renormalization of nonequilibrium dynamics at large N and finite temperature
- Fine-Tuning Solution for Hybrid Inflation in Dissipative Chaotic Dynamics
- Nonequilibrium evolution in scalar O(N) models with spontaneous symmetry breaking
- Study of the preheating phase of chaotic inflation
- Initial Time Singularities in Non-Equilibrium Evolution of Condensates and Their Resolution in the Linearized Approximation
- Primordial gravitational waves amplification from causal fluids
- One-loop theory in Robertson-Walker spacetimes: adiabatic regularization and analytic approximation
- Correlation Entropy of an Interacting Quantum Field and H-theorem for the O(N) Model
- Reheating and turbulence
- Relativistic theories of interacting fields and fluids
- Rolling with quantum fields
- Vacuum fluctuations and topological Casimir effect in Friedmann-Robertson-Walker cosmologies with compact dimensions
- Out-of-equilibrium evolution of scalar fields in FRW cosmology: renormalization and numerical simulations
- Cosmological Condensation of Scalar Fields -- Making a dark energy
- Electromagnetic two-point functions and the Casimir effect in Friedmann-Robertson-Walker cosmologies
- Coupled scalar fields in a flat FRW universe: renormalisation
- Breakdown of the semiclassical approximation during the early stages of preheating
- Gauge Fields Out-Of-Equilibrium: A Gauge Invariant Formulation and the Coulomb Gauge
- Foundational Issues in Dynamical Casimir Effect and Analogue Features in Cosmological Particle Creation
- Tunneling in a quantum field theory on a compact one-dimensional space
- Quantum state of fields in Quantum Gravity (-QGR)