Evidence for BCS Diquark Condensation in the 3+1d Lattice NJL Model

TL;DR

This paper provides numerical evidence for BCS diquark condensation in a 3+1 dimensional lattice NJL model at high baryon density, indicating superfluidity in this regime.

Contribution

It demonstrates the existence of a non-zero BCS diquark condensate at high density through lattice simulations and discusses the behavior in the zero diquark source limit.

Findings

Non-zero BCS condensate observed at high baryon density

Results consistent with superfluid diquark pairing

Analysis of infinite volume and zero temperature limits

Abstract

We present results of numerical simulations of the 3+1d Nambu - Jona-Lasinio model with a non-zero baryon chemical potential mu, with particular emphasis on the superfluid diquark condensate and associated susceptibilities. The results, when extrapolated to the zero diquark source limit, are consistent with the existence of a non-zero BCS condensate at high baryon density. The nature of the infinite volume and zero temperature limits are discussed.