Delta-gravity and Dark Energy

TL;DR

This paper introduces a gravity model with two symmetric tensors that replicates General Relativity's predictions outside matter and explains cosmic acceleration without a cosmological constant.

Contribution

The model proposes a novel gravitational framework using dual tensors, providing an alternative explanation for cosmic acceleration.

Findings

Matches all classical tests of General Relativity

Predicts accelerated cosmic expansion without a cosmological constant

Test particles follow different trajectories depending on mass

Abstract

We present a model of the gravitational field based on two symmetric tensors. The equations of motion of test particles are derived: Massive particles do not follow a geodesic but massless particles trajectories are null geodesics of an effective metric. Outside matter, the predictions of the model coincide exactly with General Relativity, so all classical tests are satisfied. In Cosmology, we get accelerated expansion without a cosmological constant.