TL;DR
This paper explores how axion fields can mediate mixing between photons and dark photons, providing a framework for potential astrophysical and cosmological observations of dark sector interactions.
Contribution
It introduces a model where a shared QCD axion field enables photon-dark photon mixing, deriving transition probabilities and suggesting observable implications.
Findings
Derived perturbative solutions for field evolution.
Calculated transition probability rates.
Proposed astrophysical and cosmological applications.
Abstract
The interaction between the dark/mirror sector and the ordinary sector is considered, where the two sectors interact with each other by sharing the same QCD axion field. This feature makes the mixing between ordinary and dark/mirror photons in ordinary and dark electromagnetic fields possible. Perturbative solutions of the equations of motion describing the evolution of fields in ordinary and dark external magnetic fields are found. User-friendly quantities such as transition probability rates and Stokes parameters are derived. Possible astrophysical and cosmological applications of this model are suggested.
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