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arXiv · 1902.05364

Exact relativistic Green's functions for the time-independent potentials

Yu. A. Simonov
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Abstract

Relativistic formalism of Green's functions is dicussed in QCD and QED,where the relativistic Green's functions are constructed using the Schwinger proper time formalism and the Fock-Feynman-Schwinger method.As a result a simple and exact method is found for the relativistic systems,where the interaction can be written in a time-independent form.In this case one can write the relativistic Green's function as a one-dimensional integral of the corresponding nonrelativistic Green's function.The explicit example for the problem of a charge in the constant magnetic field is discussed in detail,and the exact agreement with the Schwinger relativistic form is demonstrated. A similar analysis is performed in the relativistiv Coulomb probem,supporting the accuracy of the proposed relativistic formalism.

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Yu. A. Simonov. 2019-02-14. Exact relativistic Green's functions for the time-independent potentials. https://doi.org/10.1103/physrevd.99.096025

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