Universality in generalized models of inflation

Understand

We discuss the cosmological evolution of a scalar field with non standard kinetic term in terms of a Renormalization Group Equation (RGE).

• In this framework inflation corresponds to the slow evolution in a neighborhood of a fixed point and universality classes for inflationary models naturally arise.
• Using some examples we show the application of the formalism.
• The predicted values for the speed of sound $c_s$ and for the amount of non-Gaussianities produced in these models are discussed.