Berlin 2014 – wissenschaftliches Programm
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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik
MP 8: Quantenfeldtheorie II
MP 8.2: Vortrag
Donnerstag, 20. März 2014, 12:10–12:30, SPA SR125
Justification of the single-mode approximation for the quantum electrodynamics in a strong electromagnetic field — •Oleg Skoromnik1 and Iliya Feranchuk2 — 1Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2Belarusian State University, 4 Nezavisimisty ave., 220030 Minsk, Belarus
The interaction Hamiltonian of an electron and a quasi-monochromatic pulse of a strong quantized electromagnetic field is examined. Canonical transformations of the field variables are found that allows the division of the system's Hamiltonian on two parts. The first one defines the interaction between an electron and a single collective mode of the field. Parameters of this mode correspond to the central lines of the resonant mode in the pulse. The second part describes the field fluctuations relatively to the collective mode. Estimation of the field intensity is found when the effective single-mode Hamiltonian can be used for the system's description.