Abstract

The physical interpretation of induced representation intertwining as a process of materialization or localization is extrapolated to mappings (which are not intertwinings) between configuration and momentum representations. Propagation of extended particles composed of an external and an internal mode is a combination of two generalized materializations and two generalized localizations. Our aim is to submit, in the spinless case, the idea that mappings from external representations to internal ones are possible alternatives, probability amplitudes of which must be summed up in the whole propagator. However, it turns out that they lead to different final states and then correspond to 64 different propagators and not to alternatives of the same propagation. In addition to being transitions from one location to another, these propagations contain processes of interconversion between internal and external modes which are responsible for creation and annihilation of the extended particle. The physical interpretations are striking, while the mathematical stricture is poor. Inconsistencies of the model are outlined