On the QCD phase diagram at finite chemical potential

TL;DR

This paper uses a first-principles functional renormalisation group approach to explore the QCD phase diagram at finite chemical potential, revealing a close link between chiral symmetry breaking and deconfinement transitions.

Contribution

It provides novel insights into the QCD phase diagram using a first-principles method, including analysis of order parameters at imaginary and real chemical potentials.

Findings

Chiral and deconfinement phase transitions are closely related.

Order parameters are computed at both imaginary and real chemical potentials.

Results suggest a unified understanding of QCD phase transitions.

Abstract

We present results for the phase diagram of QCD with two massless quark flavours as obtained from a first-principles functional renormalisation group approach. In particular we compute order parameters for chiral symmetry breaking and quark confinement at vanishing and non-zero imaginary chemical potential. Our analytical and numerical results suggest a close relation between the chiral and the deconfinement phase transition. We discuss the properties of dual order parameters at imaginary and real chemical potential.