Non-Gaussianity from Particle Production during Inflation

Figure 13

Probability density function of 𝜁 for 𝑔²=0.1 at a series of different values of the scale factor, 𝑎. The dashed curve shows a Gaussian fit at late time 𝑎=6.2, and we have normalized the scale factor so that 𝑎=1 at the moment when particle production occurs. For illustration, we have chosen standard chaotic inflation 𝑉(𝜙)=(𝑚²/2)𝜙²; however, our qualitative results are independent of the background inflation model.