By Professor Francisco J. Ynduráin (auth.)
A absolutely relativistic therapy of the quantum mechanics of debris calls for the advent of quantum box concept, that's to assert, the quantum mechan ics of structures with an unlimited variety of levels of freedom. it's because the relativistic equivalence of mass and effort plus the quantum danger of fluctuations suggest the lifestyles of (real or digital) construction and annihilation of debris in limitless numbers. nevertheless, there exist techniques, and effort levels, the place a deal with ment by way of usual quantum mechanical instruments is suitable, and the approximation of neglecting the complete field-theoretic description is justified. hence, one could use recommendations similar to potentials, and wave equations, clas sical fields and classical currents, and so on. the current textual content is dedicated accurately to the systematic dialogue of those themes, to which we've got extra a gen eral description of 1- and two-particle relativistic states, specifically for scattering methods. A field-theoretic strategy will not be solely shunned, and actually an creation to quantum box conception is gifted during this textual content. even though, box idea isn't the item consistent with se of this booklet; except a number of examples, box concept is principally hired to set up the relationship with identical potentials, to check the classical restrict of the emission of radiation or to debate the propagation of a fermion in classical electromagnetic fields.