Confining properties of QCD at finite temperature and density

TL;DR

This paper investigates the confining properties of two-color QCD at finite temperature and density, revealing the disappearance of dual superconductivity and its relation to chiral symmetry restoration, with insights into unphysical saturation effects.

Contribution

It introduces a disorder parameter to probe dual superconductivity and explores its behavior across the QCD phase diagram at finite density and temperature.

Findings

Dual superconductivity disappears at finite density, indicating deconfinement.

Deconfinement coincides with chiral symmetry restoration.

Saturation transition due to Pauli blocking may affect phase diagram studies.

Abstract

A disorder parameter detecting dual superconductivty of the vacuum is used as a probe to characterize the confining properties of the phase diagram of two color QCD at finite temperature and density. We obtain evidence for the disappearing of dual superconductivity (deconfinement) induced by a finite density of baryonic matter, as well as for a coincidence of this phenomenon with the restoration of chiral symmetry both at zero and finite density. The saturation transition induced by Pauli blocking is studied as well, and a general warning is given about the possible effects that this unphysical transition could have on the study of the QCD phase diagram at strong values of the gauge coupling.