The Preheating - Gravitational Wave Correspondence

Abstract

The gravitational wave equations form a parametric resonance system during oscillatory reheating after inflation, when cast in terms of the electric and magnetic parts of the Weyl tensor. This is in direct analogy with preheating. For chaotic inflation with a quadratic potential, this analogy is exact. The resulting amplification of the gravitational wave spectrum begins in the broad resonance regime for chaotic inflation but quickly moves towards narrow resonance. This increases the amplitude and breaks the scale invariance of the tensor spectrum generated during inflation, an effect which may be detectable. The parametric amplification is absent, however, in 1st-order phase transition models and "warm" inflationary models with continuous entropy production.

10 pages, Revtex, 3 ps figures. Matched to published version

References in corpus (8)

• Nongaussian Isocurvature Perturbations from Inflation
• Relic gravitational waves produced after preheating
• Lattice study of classical inflaton decay
• Covariant Analysis of Gravitational Waves in a Cosmological Context
• Linearisation instability of gravity waves?
• Out of Equilibrium Dynamics of an Inflationary Phase Transition
• Evolution of Cosmological Perturbation in Reheating Phase of the Universe
• Evolution of Cosmological Perturbations during Reheating

Cited by in corpus (22)

• Gravitational Wave Experiments and Early Universe Cosmology
• The Pre-Big Bang Scenario in String Cosmology
• The cosmological gravitational wave background from primordial density perturbations
• Parametric Amplification of Gravitational Fluctuations During Reheating
• Metric preheating and limitations of linearized gravity
• Cosmic microwave background anisotropies: Nonlinear dynamics
• Massless Metric Preheating
• Geometric Reheating after Inflation
• Resonant Amplification of Gauge Fields in Expanding Universe
• Preheating and the Einstein Field Equations
• Reheating in the Presence of Inhomogeneous Noise
• Preheating of the nonminimally coupled inflaton field
• 3-pt Statistics of Cosmological Stochastic Gravitational Waves
• Magnetized gravitational waves
• Inflationary Reheating Classes via Spectral Methods
• No quasi-stable scalaron lump forms after $R^2$ inflation
• Gravitational Waves from Preheating in M-flation
• Recrudescence of massive fermion production by oscillons
• Gravitational waves in preheating
• Pattern Formation in the Early Universe
• Cosmic microwave background and parametric resonance in reheating
• Freeze-in gravitational waves and dark matter in warm inflation