Kholodov R. Resonance and polarization effects in quantum electrodynamics processes in a strong magnetic field

The thesis is devoted to the theoretical research of the elementary processes of quantum electrodynamics (synchrotron radiation (SR), one-photon production of a е+е- pair (OPP), photon scattering by an electron (PhSE), double synchrotron radiation (DSR), two-photon production of a е+е- pair (TPP), one-photon production of the е+е pair with the emission of a photon (OPPE), a production of a е+е- pair by an electron (PPE), a cascade production of a е+е- pair by a photon followed by annihilation into one photon (CPPA)) in a strong magnetic field with polarized particles and photons. The method of analyzing spin-polarization effects (influence of a polarization of the initial photons on a spin direction of the final particles and vice versa) is developed in QED processes in a strong magnetic field. It is shown that in spin-flip processes, a linear polarization of radiation changes from normal polarization (a plane of polarization is perpendicular to the direction of the field) to the anomalous one. It is found that the resonance conditions of processes takes place if the intermediate particle goes to fixed Landau levels corresponding to cyclotron resonances. Polarization of photons does not affect the resonance conditions. The theory of movement of a charged particle in an electron gas with an anisotropic temperature in a magnetic field is constructed within QFT framework taking into account the second Born approximation.