How to suppress exponential growth—on the parametric resonance of photons in an axion background
How to suppress exponential growth—on the parametric resonance of photons in an axion background
Axion-photon interactions can lead to an enhancement of the electromagnetic field by parametric resonance in the presence of a cold axion background, for modes with a frequency close to half the axion mass. In this paper, we study the role of the axion momentum dispersion as well as the effects …