Reheating in the Presence of Inhomogeneous Noise
arXiv:hep-ph/9901207 · doi:10.1103/PhysRevD.60.023505
Abstract
Explosive particle production due to parametric resonance is a crucial feature of reheating in an inflationary cosmology. Coherent oscillations of the inflaton field lead to a periodically varying mass in the evolution equation of matter and gravitational fluctuations and often induce a parametric resonance instability. In a previous paper (hep-ph/9709273) it was shown that homogeneous (i.e. space independent) noise leads to an increase of the generalized Floquet exponent for all modes, at least if the noise is temporally uncorrelated. Here we extend the results to the physically more realistic case of spatially inhomogeneous noise. We demonstrate - modulo some mathematical fine points which are addressed in a companion paper - that the Floquet exponent is a non- decreasing function of the amplitude of the noise. We provide numerical evidence for an even stronger statement, namely that in the presence of inhomogeneous noise, the Floquet exponent of each mode is larger than the maximal Floquet exponent of the system in the absence of noise.
arXiv comment21 pages, 4 figures
References in corpus (18)
- Towards the Theory of Reheating After Inflation
- Reheating after Inflation
- Universe Reheating after Inflation
- Structure of Resonance in Preheating after Inflation
- Classical decay of inflaton
- Relic gravitational waves produced after preheating
- Preheating of Fermions
- Lattice study of classical inflaton decay
- Parametric Amplification of Gravitational Fluctuations During Reheating
- The Universe after inflation: the wide resonance case
- Post-Inflation Reheating in an Expanding Universe
- Catastrophic Particle Production under Periodic Perturbation
- Nonequilibrium dynamics of fermions in a spatially homogeneous scalar background field
- Reheating in the Presence of Noise
- Preheating and the Einstein Field Equations
- Inflationary Reheating Classes via Spectral Methods
- The Preheating - Gravitational Wave Correspondence
- Erice Lectures on Inflationary Reheating
Cited by in corpus (25)
- Inflation Dynamics and Reheating
- Reheating in Inflationary Cosmology: Theory and Applications
- Nonperturbative Dynamics Of Reheating After Inflation: A Review
- Parametric Amplification of Metric Fluctuations During Reheating in Two Field Models
- Cosmology of the Very Early Universe
- Reheating the Universe After Multi-Field Inflation
- Preheating with non-minimally coupled scalar fields in higher-curvature inflation models
- Effect of the Generalized Uncertainty Principle on Post-Inflation Preheating
- From Wires to Cosmology
- Primordial magnetic fields from metric perturbations
- Preheating after N-flation
- Preheating of the nonminimally coupled inflaton field
- Quantum Out-of-Equilibrium Cosmology
- Multifield Stochastic Particle Production: Beyond a Maximum Entropy Ansatz
- Chaos, decoherence and quantum cosmology
- Graviton to Photon Conversion via Parametric Resonance
- Resonant Production of Topological Defects
- Stochastic Particle Production in a de Sitter Background
- Towards a New Proof of Anderson Localization
- Stochastic Production Of Kink-Antikink Pairs In The Presence Of An Oscillating Background
- Entropy Production in the Inflationary Epoch Using the Gouy-Stodola Theorem
- Gravitational Wave Resonance in Ultra-Light Dark Matter Halos
- Shape of the inflaton potential and the efficiency of the universe heating
- Amplification induced by white noise
- Nonperturbative evaluation of quantum particle production in parametric resonance enhanced by noise