Extended axion electrodynamics, relic axions and dark matter fingerprints in the terrestrial electromagnetic field

Abstract

© 2013 Proceedings of the 9th Patras Workshop on Axions, WIMPs and WISPs, PATRAS 2013. All rights reserved. We consider extended versions of the Einstein-Maxwell-axion model based on the Lagrangian, which is linear in the pseudoscalar (axion) field, linear or quadratic in the gradient four-vector of the axion field, linear in the Riemann tensor, and includes the four-vector of macroscopic velocity of the system. We discuss applications to four problems, which are connected with axion-photon-graviton coupling in the anisotropic Bianchi-I cosmology, optical activity in the isotropic Friedmann-type universe, non-minimal effects in the plane gravitational waves background, and evolution of terrestrial magnetic and electric fields in the axion dark matter environment.