Dark energy based on exotic statistics

TL;DR

This paper explores a novel dark energy model based on particles called ewkons that obey unorthodox statistics, leading to cosmological solutions similar to existing dark energy candidates.

Contribution

It introduces a new dark energy model using ewkons with unconventional statistics and provides an effective scalar field description and cosmological solutions.

Findings

Ewkons can mimic dark energy behavior with negative pressure.

A scalar field representation of ewkons is developed.

Cosmological solutions for ewkon-based dark energy are obtained.

Abstract

Dark energy is an elusive concept, which has been introduced two decades ago in order to make the acceleration of the universe a comprehensible phenomenon. However, the nature of this energy is far from being understood, both from a fundamental as well as an observational way. In this work we study cosmological consequences of the existence of particles (which we called ``ewkons'' in a previous work) which are quasi distinguishable, obey unorthodox statistics, and have an equation of state similar to many existent dark energy candidates (including negative relation between pressure and energy density). We find an effective scalar field description of this ewkon fluid, and obtain cosmological solutions for the dark energy dominated epoch. This can be considered as a one-parameter class of dark energy models.