Accelerated expansion of a universe containing a self-interacting Bose-Einstein gas

TL;DR

This paper proposes a cosmological model where a Bose-Einstein condensate of self-interacting particles causes accelerated universe expansion, addressing the horizon problem while remaining consistent with nucleosynthesis.

Contribution

It introduces a novel model linking Bose-Einstein condensates with cosmic acceleration, including conditions for negative pressure and phantom regimes.

Findings

Model predicts accelerated expansion from Bose-Einstein condensate

Phantom-accelerated regime solves horizon problem

Model remains consistent with nucleosynthesis constraints

Abstract

Acceleration of the universe is obtained from a model of non-relativistic particles with a short-range attractive interaction, at low enough temperature to produce a Bose-Einstein condensate. Conditions are derived for negative-pressure behavior. In particular, we show that a phantom-accelerated regime at the beginning of the universe solves the horizon problem, consistently with nucleosynthesis.