Langevin analysis of eternal inflation

@article{Gratton2005LangevinAO,
  title={Langevin analysis of eternal inflation},
  author={Steven Gratton and Neil Turok},
  journal={Physical Review D},
  year={2005},
  volume={72},
  pages={043507}
}
It has been widely claimed that inflation is generically eternal to the future, even in models where the inflaton potential monotonically increases away from its minimum. The idea is that quantum fluctuations allow the field to jump uphill, thereby continually revitalizing the inflationary process in some regions. In this paper we investigate a simple model of this process, pertaining to {lambda}{phi}{sup 4} inflation, in which analytic progress may be made. We calculate several quantities of… 
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