Natural exit of fresh inflation to a radiation dominated universe

TL;DR

This paper demonstrates that a natural transition from fresh inflation to a radiation-dominated universe occurs when the inflaton is coupled to gravity with a specific coupling constant, highlighting a seamless exit from inflation.

Contribution

It reveals that the transition from fresh inflation to radiation domination is natural at a specific gravitational coupling value, $\xi=1/4$, providing insight into inflationary dynamics.

Findings

Transition is natural at $\xi=1/4$

Fresh inflation ends seamlessly into radiation era

Coupling to gravity influences exit dynamics

Abstract

We examine the transition from a fresh inflationary scenario to a radiation dominated universe when the inflaton field is coupled to gravity. We show that this transition is very natural when this coupling is $\xi=1/4$ at the end of fresh inflation. This is a very important result that shows as fresh inflation has a natural exit to the radiation dominated epoch.