Entropy mode loops and cosmological correlations during perturbative
  reheating
  Recently, it has been shown that during preheating the entropy modes
circulating in the loops, which correspond to the inflaton decay products,
meaningfully modify the cosmological correlation functions at superhorizon
scales. In this paper, we determine the significance of the same effect when
reheating occurs in the perturbative regime. In a typical two scalar field
model, the magnitude of the loop corrections are shown to depend on several
parameters like the background inflaton amplitude in the beginning of
reheating, the inflaton decay rate and the inflaton mass. Although the loop
contributions turn out to be small as compared to the preheating case, they
still come out larger than the loop effects during inflation.
