Alternative inflationary scenario due to compact extra dimensions

TL;DR

This paper proposes an alternative inflationary model driven by compact extra dimensions, suggesting they can induce negative pressure and drive early universe inflation.

Contribution

It introduces a 5D perfect fluid model and compares energy-momentum tensors for space-like and time-like extra dimensions, offering a new perspective on inflation.

Findings

Extra dimensions can cause negative pressure in the early universe.

The model supports alternative inflation scenarios driven by higher-dimensional effects.

Comparison of scalar field energy-momentum tensors with extra dimensions.

Abstract

The main goal of this paper is to give an alternative interpretation of space-like and time-like extra dimensions as a primary factor for inflation in the early universe. We introduce the 5-dimensional perfect fluid and compare the energy-momentum tensor for the bulk scalar field with space-like and time-like extra dimensions. It is shown, that additional dimensions can imply to negative pressure in the slow roll regime in the early higher-dimensional world.