Irreversible Thermodynamic Description of Dark Matter and Radiation Creation during Inflationary Reheating

Figure 5

Time variation of the dark matter energy density (a) and of the radiation (b) during the reheating period in the presence of an exponential scalar field potential, for different values of the decay width of the scalar field: (solid curve), (dotted curve), (dash dotted curve), (dashed curve), and (dash double dotted curve), respectively. For we have adopted the value . The initial conditions used to numerically integrate (102) are , , , , and , respectively.

(a)

(b)