The equation of state and surface tension of QCD in the first order phase transition region

TL;DR

This paper develops a comprehensive model of QCD phase transitions, calculating the equation of state and surface tension in the first order transition region using functional approaches and phenomenological methods.

Contribution

It introduces a combined approach using functional QCD and phenomenological modeling to describe the QCD phase structure, including surface tension and phase boundaries.

Findings

Determined phase transition line and coexistence boundary lines.

Computed thermodynamic quantities for stable and unstable phases.

Estimated the surface tension of the QCD first order transition.

Abstract

We build up a complete description of QCD phase structure by applying the parametrization of the chiral and deconfinement order parameters upon the calculations from functional QCD approaches. In particular in the first order phase transition region at high chemical potential, both the phase transition line using Maxwell construction and the coexistence boundary lines from the spinodal decompostion are determined. We compute the thermodynamic quantities including the number density, the energy density, the pressure and also the free energy for both stable and unstable phases of QCD. Additionally, after applying a phenomenological description of the inhomogeneity of the QCD free energy, we obtain the surface tension of the first order phase transition of QCD.