Extended axion electrodynamics: Optical activity induced by nonstationary dark matter

TL;DR

This paper develops an extended Einstein-Maxwell-axion model to analyze nonstationary dark matter effects on optical activity, revealing new insights into axion-induced polarization phenomena in a dynamic gravitational context.

Contribution

It introduces a self-consistent, extended axion electrodynamics framework incorporating nonstationary effects and macroscopic axion velocity, advancing theoretical understanding of axion-photon interactions.

Findings

Extended equations of axion electrodynamics derived.

Nonstationary effects lead to optical activity modifications.

New theoretical insights into axion-induced polarization phenomena.

Abstract

We establish a new self-consistent Einstein-Maxwell-axion model based on the Lagrangian, which is linear in the pseudoscalar (axion) field and its four-gradient and includes the four-vector of macroscopic velocity of the axion system as a whole. We consider extended equations of the axion electrodynamics, modified gravity field equations, and discuss nonstationary effects in the phenomenon of optical activity induced by axions.