Dynamics of chiral phase transition in a $N_f=2+1$ soft-wall AdS/QCD model

TL;DR

This paper explores the real-time evolution of chiral phase transitions in a soft-wall AdS/QCD model, revealing complex thermalization behaviors near transition regions, and aligns with the Columbia plot's phase diagram.

Contribution

It introduces a non-equilibrium study of chiral condensate dynamics in a soft-wall AdS/QCD model, extending understanding of QCD matter thermalization.

Findings

Thermalization exhibits non-trivial intermediate-time behavior near transition regions.

The phase diagram qualitatively matches the Columbia plot.

Real-time evolution of the chiral condensate is successfully modeled.

Abstract

We investigate the real-time dynamics of the chiral phase transition in a soft-wall AdS/QCD model, of which the mass plane phase diagram from equilibrium calculation is qualitatively consistent with the so-called Columbia plot. By directly solving the non-equilibrium evolution of the order parameter of the chiral phase transition, i.e. the chiral condensate, we study the thermalization of the QCD matter in different regions of the quark mass plane. It is shown that, when the system is close to the transition region, the thermalization process will show non-trivial behavior in the intermediate time region.