Holographic nuclear matter in presence of chemical potential at finite temperature

TL;DR

This paper investigates the properties of holographic nuclear matter at finite temperature and chemical potential using the Sakai-Sugimoto model, revealing temperature-dependent phase transitions and phase continuity.

Contribution

It introduces a temperature-dependent instanton size in the holographic model and analyzes nuclear matter properties across different temperatures and chemical potentials.

Findings

Phase transition point shifts with temperature.

Continuity observed between baryonic and quark phases.

Speed of sound varies with chemical potential and temperature.

Abstract

We study the dense nuclear matter within the holographic Sakai-Sugimoto model. The nuclear matter is described via instantons in bulk, whose size has the new temperature dependency. Then, properties of nuclear matter have been studied for different temperatures. For example, free energy and baryon density are examined for different temperature values. Also, nuclear matter properties, like the speed of sound and connection of nuclear matter and quark matter, are discussed. As we have increased the temperature, the phase transition value has been changed from baryon to quark, which is non-physical. Also, we can see continuity between the baryonic and quark phases. Speed of sound at the low chemical potential in the presence of temperature is different, but when the potential increases, the effect of temperature on the speed of sound will remain unchanged. In the phase diagram, for significant chemical potential, chiral symmetry is restored and provides all things that we have the realistic model.