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: email@example.com
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