Assuming T ≪ 1 we expect D ≈ 0 since if there is a very small probability for the particle to be in region III, the probability of coming back from it through the barrier must be even smaller (in othe...Assuming T ≪ 1 we expect D ≈ 0 since if there is a very small probability for the particle to be in region III, the probability of coming back from it through the barrier must be even smaller (in other words, if \(D \neq 0\) we would have an increasing probability to have a wave coming out of the barrier).
