Rotation catalyzed chiral magnetovortical instability

TL;DR

This paper shows that background rotation enhances the chiral magnetovortical instability in chiral magnetohydrodynamics, leading to potential new dynamo mechanisms in rotating chiral plasmas.

Contribution

It reveals how rotation splits Alfven waves into magneto-Coriolis waves and demonstrates the universal instability of the low-frequency wave with even weak chiral vortical effects.

Findings

Rotation splits Alfven waves into magneto-Coriolis waves.

Low-frequency magneto-Coriolis wave is always unstable with chiral vortical effect.

Potential for new dynamo mechanisms in rotating chiral plasmas.

Abstract

We demonstrate that a background rotation significantly catalyzes the chiral magnetovortical instability in chiral magnetohydrodynamics. The rotation splits the linearly polarized Alfven wave into two circularly polarized magneto-Coriolis waves, one of which exhibits a lower frequency than the original Alfven wave. We find that this low-frequency magneto-Coriolis wave is always unstable in the presence of even a weak chiral vortical effect. This instability may enable new dynamo mechanism applicable to various rotating chiral plasmas.