Delayed Reheating and the Breakdown of Coherent Oscillations

Abstract

We analyze the evolution of the perturbations in the inflaton field and metric following the end of inflation. We present accurate analytic approximations for the perturbations, showing that the coherent oscillations of the post-inflationary condensate necessarily break down long before any current phenomenological constraints require the universe to become radiation dominated. Further, the breakdown occurs on length-scales equivalent to the comoving post-inflationary horizon size. This work has implications for both the inflationary "matching" problem, and the possible generation of a stochastic gravitational wave background in the post-inflationary universe.

18 pages, 5 figures, v2: references added, extended discussion in section 3

References in corpus (9)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Theory and Numerics of Gravitational Waves from Preheating after Inflation
• A Gravitational Wave Background from Reheating after Hybrid Inflation
• Gravitational Wave Production At The End Of Inflation
• Constraints on primordial density perturbations from induced gravitational waves
• GUT-Scale Primordial Black Holes: Consequences and Constraints
• Collapse of Small-Scale Density Perturbations during Preheating in Single Field Inflation
• Gravitational Waves From the End of Inflation: Computational Strategies
• Generation of gravitational waves during early structure formation between cosmic inflation and reheating

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