SF1-2 - (SF1) Strong (EM) Field Physics and Astrophysics - (SF2) Ground experiments and astrophysical observations in Strong Field Physics |
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Speaker |
Gitman, Dmitri |
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Coauthors |
Gavrilov Sergei; Gitman Dmitri |
| Talk Title |
QED Processes in the Presence of Potential Steps, in Particular, Klein Step |
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Abstract |
QFT approaches elaborated for treating quantum effects in time-dependent external electric fields are not directly applicable to time-independent non-uniform electric fields and their generalization for the such fields was not sufficiently developed. These fields can also create particles from the vacuum, the Klein paradox being closely related to this process. We believe that our work presents a consistent solution of the latter problem. Quantizing the Dirac and scalar fields with time independent backgrounds, we have found in- and out-creation and annihilation operators that allow one to have particle interpretation of the physical system under consideration. To justify the proposed identification, we have performed a detailed mathematical and physical analysis of solutions of the corresponding relativistic wave equations with a subsequent QFT analysis. We have elaborated a nonperturbative technics that allows one to calculate all characteristics of zero-order processes such scattering, reflection, and electron-positron pair creation, and to calculate Feynman diagrams that describe all characteristics of processes with interaction between the in-, out-particles and photons. |
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