Primordial dark energy from a condensate of spinors in a 5D vacuum

TL;DR

This paper proposes that a condensate of free spinors in a 5D vacuum can drive inflation and potentially explain dark energy in the early universe, linking higher-dimensional physics to cosmological acceleration.

Contribution

It introduces a novel 5D spinor condensate model that induces effective 4D inflationary expansion and offers a candidate for primordial dark energy.

Findings

Spinor condensate induces 4D de Sitter expansion

Model links higher-dimensional spinors to dark energy

Dark energy density evolves with inflationary expansion

Abstract

We explore the possibility that the expansion of the universe can be driven by a condensate of spinors which are free of interactions on a 5D relativistic vacuum defined on an extended de Sitter spacetime which is Riemann-flat. The extra coordinate is considered as noncompact. After making a static foliation on the extra coordinate, we obtain an effective 4D (inflationary) de Sitter expansion which describes an inflationary universe. We found that the condensate of spinors here studied could be an interesting candidate to explain the presence of dark energy in the early universe. The dark energy density which we are talking about is poured into smaller sub-horizon scales with the evolution of the inflationary expansion.