Deconfinement Through Chiral Transition In 2 Flavour QCD

TL;DR

This paper proposes that in two-flavor QCD, deconfinement occurs simultaneously with chiral symmetry restoration due to the alignment of the Polyakov loop induced by the chiral condensate, supported by lattice calculations.

Contribution

It introduces a mechanism linking deconfinement and chiral transition through the external field effect of the chiral condensate on the Polyakov loop.

Findings

Polyakov loop susceptibilities show singular behavior at the chiral transition temperature.

Deconfinement and chiral symmetry restoration occur concurrently in two-flavor QCD.

Lattice calculations support the proposed mechanism.

Abstract

We propose that in QCD with dynamical quarks, colour deconfinement occurs when an external field induced by the chiral condensate strongly aligns the Polyakov loop. This effect sets in at the chiral symmetry restoration temperature $T_{\chi}$ and thus makes deconfinement and chiral symmetry restoration coincide. The predicted singular behavior of Polyakov loop susceptibilities at $T_{\chi}$ is shown to be supported by finite temperature lattice calculations.