5-dimensional solution with acceleration and small variation of G

TL;DR

This paper presents a five-dimensional cosmological model with specific fields that allows for accelerated expansion of our universe while maintaining a small variation in the effective gravitational constant.

Contribution

It introduces a new five-dimensional solution with two 2-forms and phantom scalar fields, demonstrating compatibility of acceleration with small G variation.

Findings

Accelerated expansion of 3D space achieved.

Small variation of effective gravitational constant maintained.

Model constraints ensure physical viability.

Abstract

A 5-dimensional cosmological solution in the model with two 2-forms and two ``phantom'' scalar fields is considered. The model contains two dilatonic coupling vectors obeying certain restrictions. It is shown that there exists a time interval where accelerating expansion of ``our'' 3-dimensional space is compatible with a small value of effective gravitational ``constant'' variation.