Dimension Driven Accelerating Universe

TL;DR

This paper explores higher-dimensional gravity theories as a natural explanation for the universe's acceleration, suggesting extra dimensions produce effects similar to dark energy without introducing it explicitly.

Contribution

It demonstrates that higher-dimensional metric terms can induce acceleration, mimicking quintessence and Chaplygin gas models, offering a novel geometric perspective on cosmic acceleration.

Findings

Higher-dimensional metrics produce negative pressure driving acceleration

Cosmology mimics quintessence and Chaplygin gas scenarios

Model suggests extra dimensions influence observable universe dynamics

Abstract

The current acceleration of the universe leads us to investigate higher dimensional gravity theory, which is able to explain acceleration from a theoretical view point without the need of introducing dark energy by hand. We argue that the terms containing higher dimensional metric coefficients produce an extra negative pressure that apparently drives an acceleration of the 3D space, tempting us to suggest that the accelerating universe seems to act as a window to the existence of extra spatial dimensions. Interesting to point out that in this case our cosmology apparently mimics the well known quintessence scenario fuelled by a generalised Chaplygin-type of fluid where a smooth transition from a dust dominated model to a de Sitter like one takes place. Correspondence to models generated by a tachyonic form of matter is also briefly discussed.