Spontaneous topological transitions of electromagnetic fields in spatially inhomogeneous CP-odd domains

TL;DR

This paper investigates how spatial inhomogeneities in CP-odd domains of hot QCD matter can spontaneously induce transitions in the topology of electromagnetic fields, characterized by magnetic helicity, using a Maxwell-Chern-Simons model.

Contribution

It introduces a theoretical framework showing that inhomogeneous CP-odd domains can cause spontaneous topological transitions in electromagnetic fields.

Findings

Spontaneous magnetic helicity transitions occur in inhomogeneous CP-odd domains.

The Maxwell-Chern-Simons model effectively describes these topological changes.

Spatial inhomogeneity is a key factor in inducing electromagnetic topological transitions.

Abstract

Metastable CP-odd domains of the hot QCD matter are coupled to QED via the chiral anomaly. The topology of electromagnetic field in these domains is characterized by magnetic helicity. It is argued, using the Maxwell-Chern-Simons model, that spatial inhomogeneity of the domains induces spontaneous transitions of electromagnetic field between the opposite magnetic helicity states.