Spin ordered phase transitions in neutron matter under the presence of a strong magnetic field

TL;DR

This paper investigates spin ordered phase transitions in dense neutron matter under strong magnetic fields using the Skyrme model, identifying two distinct spin configurations with different thermodynamic properties.

Contribution

It introduces a detailed analysis of two spin ordered states in neutron matter under magnetic fields, highlighting their thermodynamic differences and potential experimental signatures.

Findings

Two types of spin ordered states identified

Equation of state and sound velocity differ between states

Majority spins align opposite or along magnetic field

Abstract

In dense neutron matter under the presence of a strong magnetic field, considered in the model with the Skyrme effective interaction, there are possible two types of spin ordered states. In one of them the majority of neutron spins are aligned opposite to magnetic field (thermodynamically preferable state), and in other one the majority of spins are aligned along the field (metastable state). The equation of state, incompressibility modulus and velocity of sound are determined in each case with the aim to find the peculiarities allowing to distinguish between two spin ordered phases.