Gravitational Waves From the End of Inflation: Computational StrategiesPhysical Review D
AbstractParametric 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.
Citation InformationJohn T. Giblin, Richard Easther and Eugene A. Lim. "Gravitational Waves From the End of Inflation: Computational Strategies" Physical Review D Vol. 77 (2008)
Available at: http://works.bepress.com/tom_giblin/12/