Abstract

Quantum effects are considered in the external field, which is a superposition of a constant uniform electromagnetic field and a plane wave field. The complete and orthonormal sets of solutions to the Klein-Gordon and Dirac equations are constructed for this field. The probabilities of scattering and pair creation are calculated. The representations of various Green functions, which are used in quantum electrodynamics with unstable vacuum, are obtained. The radiative processes are explored for the field under consideration.

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