Large Logarithms from Quantum Gravitational Corrections to a Massless,
  Minimally Coupled Scalar on de Sitter
  We consider single graviton loop corrections to the effective field equation
of a massless, minimally coupled scalar on de Sitter background in the simplest
gauge. We find a large temporal logarithm in the approach to freeze-in at late
times, but no correction to the feeze-in amplitude. We also find a large
spatial logarithm (at large distances) in the scalar potential generated by a
point source, which can be explained using the renormalization group with one
of the higher derivative counterterms regarded as a curvature-dependent field
strength renormalization. We discuss how these results set the stage for a
project to purge gauge dependence by including quantum gravitational
corrections to the source which disturbs the effective field and to the
observer who measures it.
