Intermediate inflation from rainbow gravity
  It is possible to dualize theories based on deformed dispersion relations and
Einstein gravity so as to map them into theories with trivial dispersion
relations and rainbow gravity. This often leads to "dual inflation" without the
usual breaking of the strong energy condition. We identify the dispersion
relations in the original frame which map into "intermediate" inflationary
models. These turn out to be particularly simple: power-laws modulated by
powers of a logarithm. The fluctuations predicted by these scenarios are near,
but not exactly scale-invariant, with a red running spectral index. These
dispersion relations deserve further study within the context of quantum
gravity and the phenomenon of dimensional reduction in the ultraviolet.
