Speaker
Description
A coherently oscillating axion field is one of the dark matter candidate. It is known that the propagation of photons in the presence of axion dark matter is governed by the Mathieu equation. It is also known that axion and photon can mix with each other in the presence of magnetic fields.
Thus, we investigated what happens to the system where the axion dark matter and magnetic fields coexist. This system can be regarded as a coupled system of the axion and the photon whose equations contain the Mathieu type terms. We found that the instability condition is changed in contrast to the conventional Mathieu equation.
In my talk, I will explain the stability of axion dark matter-photon system in terms of both numerical and analytical methods. I also touch on what type of physical system needs to be arranged to give rise to instability condition we found.
