Quantum Stress Tensor Fluctuation Effects in Inflationary Cosmology
  We review several related investigations of the effects of the quantum stress
tensor of a conformal field in inflationary cosmology. Particular attention
will be paid to the effects of quantum stress tensor fluctuations as a source
of density and tensor perturbations in inflationary models. These effects can
possibly depend upon the total expansion factor during inflation, and hence be
much larger than one might otherwise expect. They have the potential to
contribute a non-scale invariant and non-Gaussian component to the primordial
spectrum of perturbations, and might be observable.
