Higher dimensional cosmological model with a phantom field

TL;DR

This paper presents a higher-dimensional cosmological model with a phantom scalar field that naturally explains the recent transition of our universe from deceleration to acceleration.

Contribution

It introduces an exact solution in a higher-dimensional gravity theory with a negative kinetic energy scalar field, modeling the universe's accelerated expansion.

Findings

Universe transitions from deceleration to acceleration

Exact cosmological solution found in higher-dimensional theory

Transition time aligns with recent cosmic acceleration

Abstract

We consider a higher dimensional gravity theory with a negative kinetic energy scalar field and a cosmological constant. We find that the theory admits an exact cosmological solution for the scale factor of our universe. It has the feature that the universe undergoes a continuous transition from deceleration to acceleration at some finite time. This transition time can be interpreted as that of recent acceleration of our universe.