Redshift drift as a model independent probe of dark energy

TL;DR

Redshift drift can serve as a direct, model-independent method to detect violations of the strong energy condition in the universe, providing insights into dark energy without relying on specific metric assumptions.

Contribution

The paper demonstrates that redshift drift is a promising, model-independent probe of the violation of the strong energy condition in general relativity, independent of the universe's metric.

Findings

Redshift drift signals indicate potential violations of the strong energy condition.

Redshift drift can be used as a direct probe of dark energy without assuming a specific metric.

The approach is independent of the universe's metric tensor.

Abstract

It is well known that positive values of redshift drift is a signature of dark energy within the conventionally studied Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) universe models. Here we show -- without making assumptions on the metric tensor of the Universe -- that redshift drift is a promising direct probe of violation of the strong energy condition within the theory of general relativity.