Extended axion electrodynamics: Anomalous dynamo-optical response induced by gravitational pp-waves

Abstract

We extend the Einstein-Maxwell-axion theory including into the Lagrangian cross-terms of the dynamo-optical type, which are quadratic in the Maxwell tensor, linear in the covariant derivative of the macroscopic velocity four-vector, and linear in the pseudoscalar (axion) field or its gradient four-vector. We classify the new terms with respect to irreducible elements of the covariant derivative of the macroscopic velocity four-vector of the electromagnetically active medium: the expansion scalar, acceleration four-vector, shear and vorticity tensors. Master equations of the extended axion electrodynamics are used for the description of the response of an axionically active electrodynamic system, induced by a pp-wave gravitational background. We show that this response has a critical character, i.e., the electric and magnetic fields, dynamo-optically coupled to the axions, grow anomalously under the influence of the external pp-wave gravitational field.

5 pages, based on talks on ICGAC-11, October, 1-5, 2013, Almaty

References in corpus (5)

• Search for axion-like particles using a variable baseline photon regeneration technique
• First results from the OSQAR photon regeneration experiment: No light shining through a wall
• Q & A Experiment to Search for Vacuum Dichroism, Pseudoscalar-Photon Interaction and Millicharged Fermions
• A Photon Regeneration Experiment for Axionlike Particle Search using X-rays
• Anomalous character of the axion-photon coupling in a magnetic field distorted by a pp-wave gravitational background

Cited by in corpus (2)

• Electrodynamics of a Cosmic Dark Fluid
• Birefringence induced by pp-wave modes in an electromagnetically active dynamic aether