Inflation with a graceful exit and entrance driven by Hawking radiation

TL;DR

This paper proposes a cosmological inflation model driven by Hawking-like radiation in FRW space-time, featuring natural mechanisms for both the onset and termination of inflation based on quantum gravity hypotheses.

Contribution

It introduces a novel inflationary model where Hawking radiation causes rapid expansion and naturally transitions to standard cosmology, linking quantum gravity effects to early Universe dynamics.

Findings

Hawking-like radiation induces rapid early Universe expansion.

The model provides a natural exit from inflation as Hawking temperature decreases.

It suggests a quantum gravity-based mechanism for inflation onset and end.

Abstract

We present a model for cosmological inflation which has a natural "turn on" and a natural "turn off" mechanism. In our model inflation is driven by the Hawking-like radiation that occurs in Friedman-Robertson-Walker (FRW) space-time. This Hawking-like radiation results in an effective negative pressure "fluid" which leads to a rapid period of expansion in the very early Universe. As the Universe expands the FRW Hawking temperature decreases and the inflationary expansion turns off and makes a natural transition to the power law expansion of a radiation dominated universe. The "turn on" mechanism is more speculative, but is based on the common hypothesis that in a quantum theory of gravity at very high temperatures/high densities Hawking radiation will stop. Applying this speculation to the very early Universe implies that the Hawking-like radiation of the FRW space-time will be turned off and therefore the inflation driven by this radiation will turn off.