In vanilla QM, time is Newtonian - taken as a given, independent variable. You can "tack on time dependence" as it were. (Special) relativistic QM becomes qua

In vanilla QM, time is Newtonian - taken as a given, independent variable. You can "tack on time dependence" as it were. (Special) relativistic QM becomes quantum field theory (well, first Schrodinger's eq becomes the Klein Gordon equation, then Dirac stares into the fire and anti matter pops out... etc...). I will put this here for others who may not know about these distinctions.