Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 54: Poster 3

Q 54.65: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.I+II

Kinetic approach to quantum radiation reaction — •Norman Neitz and Antonino Di Piazza — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg

Nonlinear quantum electrodynamical effects gained more and more attention over the last years due to the increasing intensity of modern laser systems and the availability of high energetic electron beams. Although the laser intensities might not be sufficiently high to allow pair creation, especially the collision of laser pulses with ultra-relativistic electrons will lead to processes that include multi-photon emissions whose influences are significant for the dynamic of the electrons in the laser field. Therefore we study the evolution of distribution functions for a system of an intense laser field and a counterpropagating electron beam. We treat the problem in the well-known framework of strong-field QED [1] and formulate cascade equations in the kinetic approach [2]. We restrict ourselves to the impact of pure radiation effects and thus exclude the possibility of pair creation. We show analytically that the classical limit coincides with the result of the Landau-Lifshitz equation [3] and perform numerically simulations for different field strengths and electron momenta.
[1] V. I. Ritus, J. Sov. Laser Res. 6, 497 (1985).
V. N. Baier, V. M. Katkov and V. M. Strakhovenko, “Electromagnetic processes at high energies in oriented single crystals” (World Scientific, Singapore, 1998).
L. D. Landau and E. M. Lifshitz, “The Classical Theory of Fields” (Elsevier, Oxford, 1975)