Non-violation of Energy Conditions in the future accelerated universe due to quantum effects

TL;DR

This paper demonstrates that quantum effects in a late universe model prevent violations of energy conditions, maintaining physical plausibility despite accelerated expansion and strong curvature.

Contribution

It shows that quantum corrections to Einstein's equations can prevent energy condition violations in an accelerated universe model.

Findings

Quantum effects dominate at late times in the universe.

Quantum corrections prevent violation of energy conditions.

Model avoids future singularities like big-rip.

Abstract

Here, an accelerated phantom model for the late universe is explored, which is free from future singularity. It is interseting to see that this model exhibits strong curvature for all time in future, unlike models with `big-rip singularity' showing high curvature near singularity time only. So, quantum gravity effects grow dominant as time increases in the late universe too. More importantly, it is demonstrated that that quantum corrections to FRW equations lead to non-violation of `cosmic energy conditions' of general relativity, which are violated for accelerating universe without these corrections.