Gravitational Waves From the End of Inflation: Computational Strategies
Dec, 2007Citations per year
Abstract: (arXiv)
Parametric resonance or preheating is a plausible mechanism for bringing about the transition between the inflationary phase and a hot, radiation dominated universe. This epoch results in the rapid production of heavy particles far from thermal equilibrium and could source a significant stochastic background of gravitational radiation. Here, we present a numerical algorithm for computing the contemporary power spectrum of gravity waves generated in this post-inflationary phase transition for a large class of scalar-field driven inflationary models. We explicitly calculate this spectrum for both quartic and quadratic models of chaotic inflation, and low-scale hybrid models. In particular, we consider hybrid models with an ``inverted'' potential. These models have a very short and intense period of resonance which is qualitatively different from previous examples studied in this context, but we find that they lead to a similar spectrum of gravitational radiation.- 04.30.Db
- 98.80.Cq
- inflation
- gravitational radiation: production
- background: stochastic
- power spectrum
- field theory: scalar
- resonance: parametric
- preheating
- phi**n model: 4
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