Diquark condensation in two colour QCD

TL;DR

This paper investigates diquark condensation in two-color QCD at high density using lattice simulations in the strong coupling limit, providing evidence for a second order phase transition and matching effective theory predictions.

Contribution

It presents unquenched lattice SU(2) results at nonzero chemical potential without extrapolation, confirming diquark condensation and phase transition characteristics.

Findings

Evidence of a second order phase transition at high density

Quantitative agreement with low-energy effective Lagrangian calculations

Diquark condensate appears without external source

Abstract

Unquenched lattice SU(2) is studied at nonzero chemical potential in the strong coupling limit. The topic of diquark condensation is addressed analyzing the probability distribution function of the diquark condensate. We present results at zero external source without using any potentially dangerous extrapolation procedure. We find strong evidences for a (high density) second order phase transition where a diquark condensate appears, and show quantitative agreement of lattice calculations with low-energy effective Lagrangian calculations.