Submissions from D. N. M. Anastasiou
 [1] faKiv:2011.07561 [pdf]

Inflationary dynamics in EinsteinGaussBonnet modelsComments: 11 pages, 2 figures
In order to obtain the nonperturbative equations of the effective theories connected by GaussBonnet equations in the presence of a matter field, we have to obtain the temperature and the entropy of the vacuum state. We do this by considering the same GaussBonnet equations generated by a GaussBonnet theory with a matter field. We use the FriedmannRobertsonWalker equation as an approximation method. The GaussBonnet theory is supported by a GaussBonnet coupling and the GaussBonnet theory can be reduced to the GaussBonnet theory with a matter field. We show that the GaussBonnet coupling parameter is a good approximation method to the temperature and the entropy in the GaussBonnet theory with a matter field.