Modern Physics Letters A
Semiclassical Form of the Relativistic Particle Propagator
Dmitri M Gitman, Stoian Ivanov Zlatev
Abstract
A detailed derivation of the semiclassical form for the relativistic particle propagator in arbitrary external electromagnetic field is presented. To this end a path-integral representation is used. The final formula is a generalization of the Van Vleck–Pauli–Morette semiclassical representation in the nonrelativistic quantum mechanics. We demonstrate the efficiency of the former in the case of an arbitrary constant electromagnetic field.