Visible Energy Alternative to Dark Energy

TL;DR

This paper proposes that a minimal measurable momentum in quantum gravity leads to an accelerated universe expansion, offering an alternative explanation to Dark Energy.

Contribution

It introduces a cosmological model with a minimal measurable momentum causing acceleration, differing from traditional dark energy theories.

Findings

Universe experiences accelerated expansion due to minimal momentum effects.

Model predicts crossing of the phantom line in recent cosmological history.

Infra-red modifications of field theory can explain late-time acceleration.

Abstract

Quantum gravitational effects usually are assumed to be important on small scale (Planck scale), but actually these effects are also very significant on large (cosmological) scales. It is recognized that in curved spacetime, the existence of a minimal measurable momentum is inevitable. In this paper, we study thermodynamic properties of the late time universe in the presence of a minimal measurable momentum cutoff that encodes infra-red modification of the underlying field theory. In this regard, we consider a non-relativistic regime and show that the existence of a minimal measurable momentum in the very essence of the theory leads to accelerating expansion of the universe, which can be interpreted as an alternative to Dark Energy. The universe in this model has experienced the phantom line crossing in the near past.