That's an interesting idea Solipsis. Could you elaborate on what exactly you imagine the elements of this interference pattern being? They could be endogenous and exogenous (the psychedelic drug) ligands, although in physics (double slit experiment) the elements that create the interference pattern are wavelike in nature (photons), whereas this is not the case for receptor activation by ligands (or if it is, then
that would be the phenomenon that would help us explain the waves in the psychedelic experience, rather than interference
per se).
There could certainly be something in this, I'm just not sure about the details.