How to suppress exponential growth—on the parametric resonance of photons in an axion background

@article{Arza2020HowTS,
  title={How to suppress exponential growth—on the parametric resonance of photons in an axion background},
  author={Ariel Arza and Thomas Schwetz and Elisa Maria Todarello},
  journal={arXiv: High Energy Physics - Phenomenology},
  year={2020}
}
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 of a background gravitational potential, which can detune the resonance due to gravitational redshift. We show, by analytical as well as numerical calculations, that the resonance leads to an… Expand
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