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Delayed Reheating and the Breakdown of Coherent Oscillations

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arxiv 1003.3011 v2 pith:G6GFTERN submitted 2010-03-15 astro-ph.CO hep-phhep-th

classification astro-ph.COhep-phhep-th
keywords post-inflationarybreakdowncoherentoscillationsperturbationsuniverseaccurateanalytic
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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.

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Cited by 4 Pith papers

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  3. Constraining Nonthermal Dark Matter's Impact on the Matter Power Spectrum

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    Nonthermal dark matter produced relativistically in an early matter-dominated era remains mostly relativistic at reheating, so free streaming suppresses small-scale structure and Lyman-alpha plus Milky Way satellite d...

  4. Lectures on Reheating after Inflation

    astro-ph.CO 2019-07 unverdicted

    Lecture notes providing a generic introduction to reheating after inflation, covering its theoretical, phenomenological, and observational aspects.

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