A holographic study on QCD phase transition and neutron star properties

TL;DR

This paper explores the QCD phase transition using holographic models and applies these models to predict neutron star properties, successfully aligning with lattice QCD results and astrophysical constraints.

Contribution

It introduces a holographic Einstein-Maxwell-Dilaton-scalar model that captures QCD phase transitions and accurately predicts neutron star characteristics.

Findings

Both models reproduce lattice QCD behavior.

The Einstein-Maxwell-Dilaton-scalar system shows a first-order phase transition.

Neutron star properties match current astrophysical constraints.

Abstract

We investigate the QCD phase transition and its phase structure within Einstein-Maxwell-Dilaton-scalar system and compare the results with those obtained from the Einstein-Maxwell-Dilaton system. It is shown that both models reproduce behavior consistent with lattice QCD. In particular, the Einstein-Maxwell-Dilaton-scalar system exhibits a first-order phase transition in the pure gauge sector, aligning with predictions from Yang-Mills theory. Based on these models, we construct a holographic model for neutron stars, incorporating leptons to satisfy electric charge neutrality, and examine the cold equation of state, the mass-radius relation, and tidal deformability of neutron stars. It is demonstrated that the Einstein-Maxwell-Dilaton-scalar system enables us to describe neutron star properties that meet current astrophysical constraints.