Ferromagnetic properties of quark matter -an origin of magnetic field in compact stars-

TL;DR

This paper investigates the magnetic properties of quark matter using Landau Fermi-liquid theory, revealing a magnetic phase diagram and non-Fermi-liquid behavior, with implications for understanding magnetic fields in compact stars like magnetars.

Contribution

It presents a magnetic phase diagram of quark matter in the density-temperature plane and highlights the role of gluon screening effects on magnetic susceptibility.

Findings

Identification of a magnetic phase diagram for quark matter

Observation of non-Fermi-liquid behavior at finite temperature

Discussion of implications for magnetic fields in magnetars

Abstract

Magnetic properties of quark matter are studied within the Landau Fermi-liquid theory, and magnetic phase diagram of QCD is presented in the density-temperature plane. The screening effect for gluon propagator is emphasized to see the characteristic behavior of the magnetic susceptibility; novel non-Fermi-liquid behavior is observed at finite temperature. Some implications on the origin of the magnetic field in compact stars, especially magnetars, are briefly discussed.