Majorana Neutrino Superfluidity and Stability of Neutrino Dark Energy

TL;DR

This paper explores how Majorana neutrinos can form superfluid condensates through Cooper pairing, impacting the stability and dynamics of neutrino dark energy models.

Contribution

It introduces the concept of Majorana neutrino superfluidity in mass varying dark energy models and estimates key physical parameters like the gap and critical temperature.

Findings

Majorana neutrinos can form Cooper pairs via long-range forces

Superfluidity can alter instability scenarios in neutrino dark energy models

Bose-Einstein condensates may dominate in strong coupling regimes

Abstract

We demonstrate that Majorana neutrinos can form Cooper pairs due to long-range attractive forces and show BCS superfluidity in a class of mass varying neutrino dark energy models. We describe the condensates for Majorana neutrinos and estimate the value of the gap, critical temperature and Pippard coherence length for a simple neutrino dark energy model. In the strong coupling regime bosonic degree of freedom can become important and Bose-Einstein condensate may govern the dynamics for the mass varying neutrino models. Formation of the condensates can significantly alter the instability scenario in the mass varying neutrino models.