Possible crossover from BCS superconductivity to Bose-Einstein condensate in quark matter

TL;DR

This paper explores the potential transition from BCS superconductivity to Bose-Einstein condensation in quark matter, suggesting that at moderate densities, quark matter may be near this crossover regime.

Contribution

It investigates the BCS-BEC crossover in quark matter using the NJL model, highlighting the possibility of an intermediate BEC-like phase at moderate densities.

Findings

Quark matter at moderate density may be close to the BCS-BEC crossover.

The study indicates a precursor regime to the BEC phase in quark matter.

The NJL model effectively describes the crossover phenomena.

Abstract

The possibility of the crossover from the BCS pairing to the Bose-Einstein condensate (BEC) of diquarks with going down in density is discussed in the framework of in the Nambu Jona-Lasinio (NJL) model. We find that the quark matter at moderate density may be close to the intermediate of the crossover, the precursory regime to the BEC phase.