Inflationary 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 inflationary expansion, offering a novel candidate for the origin of dark energy in the early universe.

Contribution

It introduces a new model where spinor condensates in a 5D vacuum induce 4D inflationary expansion, providing a potential explanation for dark energy.

Findings

Spinor condensates can generate effective 4D de Sitter expansion.

The model suggests a possible origin of dark energy from higher-dimensional fields.

The approach offers an alternative to inflaton-based inflation models.

Abstract

What is the physical origin of dark energy? Could this energy be originated by other fields than the inflaton? In this work we explore the possibility that the expansion of the universe can be driven by a condensate of spinors. These spinors are free of interactions on 5D relativistic vacuum in an extended de Sitter spacetime. 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. In view of our results we conclude that the condensate of spinors here studied could be an interesting candidate to explain the presence of dark energy in the early universe.