Neutrino Condensate as Origin of Dark Energy

TL;DR

This paper proposes that dark energy originated from a neutrino condensate formed through self-interaction in the early Universe, linking dark energy to neutrino mass and addressing the coincidence problem.

Contribution

It introduces a novel model where dark energy arises from a neutrino condensate, connecting neutrino properties to cosmic acceleration.

Findings

Neutrino condensate formation can explain dark energy's origin.

The model links the timing of condensate formation to matter density.

It offers an explanation for the comparable magnitudes of dark energy and matter today.

Abstract

We propose a new solution to the origin of dark energy. We suggest that it was created dynamically from the condensate of a singlet neutrino at a late epoch of the early Universe through its effective self interaction. This singlet neutrino is also the Dirac partner of one of the three observed neutrinos, hence dark energy is related to neutrino mass. The onset of this condensate formation in the early Universe is also related to matter density and offers an explanation of the coincidence problem of why dark energy (70%) and total matter (30%) are comparable at the present time. We demonstrate this idea in a model of neutrino mass with (right-handed) singlet neutrinos and a singlet scalar.