https://doi.org/10.1140/epjc/s10052-019-6759-7
Regular Article - Theoretical Physics
Photon enhancement in a homogeneous axion dark matter background
Department of Physics, University of Florida, Gainesville, FL, 32611, USA
* e-mail: ariel.arza@ufl.edu
Received:
17
October
2018
Accepted:
6
March
2019
Published online:
20
March
2019
We study the propagation of photons in a homogeneous axion dark matter background. When the axion decay into two photons is stimulated, the photon field exhibits a parametric instability in a small bandwidth centered on one half of the axion mass. We estimate analytically the enhancement for both coherent and non-coherent axion fields and we find that this effect could be relevant in the context of miniclusters and galactic halos.
© The Author(s), 2019
