Lattice Simulation of Gravitational Wave Spectra from Varying Reheating Models

During reheating, gravitational waves could be produced. The spectrum of these gravitational waves could teach us something about the inflation potential and possible couplings to other fields. In principle, such a gravitational wave spectrum could be observed today. We are studying gravitational wave production using a lattice simulation and analytic analysis, with the goal of directly relating features of the spectrum to underlying models. We will show our preliminary results in comparison to a few well-studied models.