Non-Gaussianity from Particle Production during Inflation
Figure 9
The bump-like features generated by IR cascading. We plot the feature power spectrum obtained from fully nonlinear lattice field theory simulations (the red points) and also the result of an analytical calculation (the dashed blue curve) using the formalism described in [14]. We also superpose the fitting function ~ (the solid black curve) to illustrate the accuracy of this simple formula.
