Dynamics of Peccei-Quinn Breaking Field after Inflation and Axion Isocurvature Perturbations

@article{Harigaya2015DynamicsOP,
  title={Dynamics of Peccei-Quinn Breaking Field after Inflation and Axion Isocurvature Perturbations},
  author={Keisuke Harigaya and Masahiro Ibe and Masahiro Kawasaki and Tsutomu. T. Yanagida},
  journal={arXiv: High Energy Physics - Phenomenology},
  year={2015}
}
The Peccei-Quinn mechanism suffers from the problem of the isocurvature perturbations. The isocurvature perturbations are suppressed if the Peccei-Quinn breaking scale is large during inflation. The oscillation of the Peccei-Quinn breaking field after inflation, however, leads to the formation of domain walls due to the parametric resonance effect. In this paper, we discuss the evolution of the Peccei-Quinn breaking field after inflation in detail, and propose a model where the parametric… 
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