Chromomagnetic Instability and Induced Magnetic Field in Neutral Two-Flavor Color Superconductivity

TL;DR

This paper demonstrates that in neutral two-flavor color superconductors, chromomagnetic instability is resolved through inhomogeneous gluon condensates that induce magnetic fields, which could impact the understanding of magnetar magnetic properties.

Contribution

It introduces a novel inhomogeneous gluon condensate mechanism that removes chromomagnetic instability and induces magnetic fields in two-flavor color superconductors.

Findings

Chromomagnetic instability is eliminated by inhomogeneous gluon condensates.

Induced magnetic fields are energetically favored in the ground state.

Potential implications for magnetic fields in magnetars.

Abstract

We find that the chromomagnetic instability existing in neutral two- flavor color superconductivity at moderate densities is removed by the formation of an inhomogeneous condensate of charged gluons and the corresponding induction of a magnetic field. It is shown that this inhomogeneous ground state is energetically favored over a homogeneous one. The spontaneous induction of a magnetic field in a color superconductor at moderate densities can be of interest for the astrophysics of compact stellar objects exhibiting strong magnetic fields as magnetars.