Dark Energy and Dark Matter unification via superfluid Chaplygin gas

TL;DR

This paper proposes a unified dark sector model using a superfluid Chaplygin gas, where Bose-Einstein condensate acts as dark energy and excitations as dark matter, aligning with current cosmic acceleration observations.

Contribution

It introduces a novel superfluid Chaplygin gas model unifying dark energy and dark matter within a single exotic fluid framework.

Findings

Model aligns with current cosmic acceleration data

Predicts increasing effective cosmological constant

Foresees matter disappearance in the far future

Abstract

A new model describing the dark sector of the universe is established. The model involves Bose-Einstein condensate (BEC) as dark energy (DE) and an excited state above it as dark matter (DM). The condensate is assumed to have a negative pressure and is embodied as an exotic fluid with Chaplygin equation of state. Excitations are described as a quasiparticle gas. It is shown that the model is not in disagreement with the current observations of the cosmic acceleration. The model predicts increase of the effective cosmological constant and a complete disappearance of the matter at the far future.