Geometrical origin of entropy during inflation from the STM theory of gravity

TL;DR

This paper explores how a 5D Riemann flat metric can induce dissipative effects in the inflaton field during inflation within the STM theory of gravity, linking higher-dimensional geometry to entropy production.

Contribution

It introduces a novel approach to incorporate dissipation in inflationary dynamics using a 5D flat metric in the STM framework.

Findings

Dissipation can be modeled via higher-dimensional geometry.

Effective 4D inflationary dynamics include entropy-generating effects.

The approach connects geometric properties to thermodynamic aspects of inflation.

Abstract

Using a recently introduced 5D Riemann flat metric, we investigate the possibility of introducing dissipation in the dynamics of the inflaton field on an effective 4D FRW metric, in the framework of the STM theory of gravity.