Electrodynamics of dual superconducting chiral medium

TL;DR

This paper investigates the electrodynamics of a chiral medium with electric and magnetic charges, revealing a superconducting state with Meissner effect and stability properties influenced by magnetic helicity dissipation.

Contribution

It extends Maxwell-Chern-Simons theory to include magnetic currents, analyzing the conditions for a stable, superconducting chiral medium with both electric and magnetic conductivities.

Findings

Magnetic helicity dissipation halts the inverse cascade.

A stable superconducting state with non-zero chiral conductivity is identified.

The state exhibits Meissner effect for electric and magnetic fields.

Abstract

We study the electrodynamics of a chiral medium with electric and magnetic charges using the effective Maxwell-Chern-Simons theory extended to include the magnetic current. The exchange of helicity between the chiral medium and the magnetic field, known as the inverse cascade, is controlled by the chiral anomaly equation. In the presence of the magnetic current, the magnetic helicity is dissipated, so that the inverse cascade stops when the magnetic helicity vanishes while the chiral conductivity reaches a non-vanishing stationary value satisfying $\sigma_\chi^2< 4\sigma_e\sigma_m$, where $\sigma_e$, $\sigma_m$ and $\sigma_\chi$ are the electric, magnetic and chiral conductivities respectively. We argue that this state is superconducting and exhibits the Meissner effect for both electric and magnetic fields. Moreover, this state is stable with respect to small magnetic helicity fluctuations; the magnetic helicity becomes unstable only when the inequality mentioned above is violated.