Hill crossing during preheating after hilltop inflation

@article{Antusch2015HillCD,
  title={Hill crossing during preheating after hilltop inflation},
  author={Stefan Antusch and David Nolde and Stefano Orani},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2015},
  volume={2015},
  pages={009 - 009}
}
In ``hilltop inflation'', inflation takes place when the inflaton field slowly rolls from close to a maximum of its potential (i.e. the ``hilltop'') towards its minimum. When the inflaton potential is associated with a phase transition, possible topological defects produced during this phase transition, such as domain walls, are efficiently diluted during inflation. It is typically assumed that they also do not reform after inflation, i.e. that the inflaton field stays on its side of the ``hill… 

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