In the foregoing chapter it was observed that the use of a conventional perturbative approach in SED leads to unperturbed solutions obeying classical equations of motion, whereas they should be stochastic and somehow contain ‟, if they are expected to describe the quantum world; in other words, that not even the zero-order motions of the sed system in the stationary regime should be independent of the zeropoint field and given by purely deterministic laws. It was thus concluded that standard sed is incompatible with the quantum description of nature and should consequently be revised or modified. In a few papers published along the years proposing a direct relationship between these two theories, additional assumptions were indeed introduced on top of those of standard sed;1 unfortunately they all have a tour-de-force flavor, and their rather formal approach to the problem prevents them from helping to establish a clear-cut physical connection with quantum mechanics.