Berlin 2005 – wissenschaftliches Programm

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MP: Theoretische und Mathematische Grundlagen der Physik

MP 4: Quantum Field Theory and String Theory

MP 4.4: Fachvortrag

Dienstag, 8. März 2005, 15:00–15:20, TU MA043

Spontaneous particle creation within the external field approximation of QED — •Nikodem Szpak — Institut für Theoretische Physik, J.W.Goethe Universität Frankfurt, 60054 Frankfurt/Main

It is expected that strong electrodynamic fields in QED may lead to destabilization of the vacuum if the strength of the electric field exceeds some threshold. However, rigorously, the question is still open. We treat the problem within an external field approximation of QED and study model fields in order to understand the problems appearing in the proofs. We define the spontaneous particle creation by the adiabatic limit and study it analytically and numerically. We also review the present state of the theory concerning spontaneous particle creation and report on the open theoretical problems.