ONE-LOOP CORRECTIONS TO SCALAR AND TENSOR PERTURBATIONS DURING INFLATION

Based on the stochastic gravity, we study the loop corrections to the scalar and tensor perturbations during inflation. Since the loop corrections to scalar perturbations suffer the infrared(IR) divergence, we consider the IR regularization to obtain the finite value. We find that the loop correction is amplified by the e-folding, in other words there appears the logarithmic corrections, just as discussed by M.Sloth et.al. On the other hand, we find that the tensor perturbations do not suffer from the infrared divergence.