Deconfinement phase transition in holographic QCD with matter

TL;DR

This paper investigates how matter influences the deconfinement temperature in holographic QCD, showing that increasing quark flavor number and density lowers the transition temperature, consistent with lattice QCD results.

Contribution

It provides a holographic analysis of matter effects on deconfinement temperature, including quark flavor and density dependence, with results aligning with lattice QCD.

Findings

Deconfinement temperature decreases with increasing quark flavor number.

Deconfinement temperature drops as quark density increases.

Quark contributions are suppressed by 1/N_c compared to gluonic effects.

Abstract

In the framework of a holographic QCD approach we study an influence of matters on the deconfinement temperature, $T_c$. We first consider quark flavor number ($N_f$) dependence of $T_c$. We observe that $T_c$ decreases with $N_f$, which is consistent with a lattice QCD result. We also delve into how the quark number density $\rho_q$ affects the value of $T_c$. We find that $T_c$ drops with increasing $\rho_q$. In both cases, we confirm that the contributions from quarks are suppressed by $1/N_c$, as it should be, compared to the ones from a gravitational action (pure Yang-Mills).