Calculation of nuclear matter in the presence of strong magnetic field using LOCV technique

TL;DR

This study investigates the properties of nuclear matter under strong magnetic fields using the LOCV method, revealing magnetic field effects on energy symmetry and spin polarization at various densities.

Contribution

It applies the LOCV technique with AV18 potential to analyze how strong magnetic fields influence nuclear matter properties, highlighting the breaking of energy symmetry and ferromagnetic transition conditions.

Findings

Energy symmetry is broken at magnetic fields B ≥ 10^18 G.

Magnetic fields significantly affect energy at low densities.

Spin polarization is more sensitive to magnetic fields at lower densities.

Abstract

In the present work, we are interested in the properties of nuclear matter at zero temperature in the presence of strong magnetic fields using the lowest order constraint variational (LOCV) method employing $AV_{18}$ nuclear potential. Our results indicate that in the absence of a magnetic field, the energy per particle is a symmetric function of the spin polarization parameter. This shows that for the nuclear matter, the spontaneous phase transition to a ferromagnetic state does not occur. However, we have found that for the magnetic fields $ B\gtrsim 10 ^ {18}\ G$, the symmetry of energy is broken and the energy has a minimum at a positive value of the spin polarization parameter. We have also found that the effect of magnetic field on the value of energy is more significant at the low densities. Our calculations show that at lower densities, the spin polarization parameter is more sensitive to the magnetic field.