Frankfurt 2006 – scientific programme

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A: Atomphysik

A 16: Wechselwirkung mit starken Laserpulsen I

A 16.1: Talk

Thursday, March 16, 2006, 10:40–10:55, H6

Qualitative analysis of relativistic multiphoton processes — •Karen Z. Hatsagortsyan, Carsten Müller, and Christoph H. Keitel — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany

We propose a simple, qualitative method to estimate probabilities of multiphoton processes, which also allows us to get insight into the relativistic quantum dynamics of the respective atomic system in a strong laser field. We illustrate the method by considering the known processes of above-threshold ionization, pair production in a Coulomb and a strong laser field, and pair production by a γ-quantum in a strong laser field. As an application of the method we analyze the nonperturbative multiphoton regime of the pair production process in a standing laser wave.