Geometry for the accelerating universe

TL;DR

This paper introduces an area metric framework for cosmology, replacing the Lorentzian metric, which naturally accounts for the universe's acceleration without dark energy or fine-tuning.

Contribution

It proposes a novel geometric approach using area metrics derived from string and gauge theories to explain cosmic acceleration.

Findings

Area metric cosmology explains late universe acceleration

No need for dark energy or fine-tuning in this model

Reinterprets Einstein-Hilbert action using area metric curvature scalar

Abstract

The Lorentzian spacetime metric is replaced by an area metric which naturally emerges as a generalized geometry in quantum string and gauge theory. Employing the area metric curvature scalar, the gravitational Einstein-Hilbert action is re-interpreted as dynamics for an area metric. Without the need for dark energy or fine-tuning, area metric cosmology explains the observed small acceleration of the late Universe.