Photon-Axion Conversion, Magnetic Field Configuration, and Polarization of Photons

Understand

We study the evolution of photon polarization during the photon-axion conversion process with focusing on the magnetic field configuration dependence.

• Most previous studies have been carried out in a conventional model where a network of magnetic domains is considered and each domain has a constant magnetic field.
• We investigate a more general model where a network of domains is still assumed, but each domain has a helical magnetic field.
• We find that the asymptotic behavior does not depend on the configuration of magnetic fields.