Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-04-12
Int.J.Mod.Phys.A26:2725-2733,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, LaTeX; v2: 3 misprints corrected, a note and 1 reference added; to appear in Int. J. Mod. Phys. A
Scientific paper
10.1142/S0217751X11053535
The exact propagator for an electron in a constant uniform magnetic field as the sum over Landau levels is obtained by the direct derivation by standard methods of quantum field theory from exact solutions of the Dirac equation in the magnetic field. The result can be useful for further development of the calculation technique of quantum processes in an external active medium, particularly in the conditions of moderately large field strengths when it is insufficient to take into account only the ground Landau level contribution.
Kuznetsov Alexander Vasilievich
Okrugin A. A.
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