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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.56: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1+2

Analytical tools for investigating strong-field QED processes in tightly focused laser fields — Antonino Di Piazza and •Alessandro Angioi — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg

The computation of QED rates in intense laser fields is typically performed within the plane-wave approximation [1], although the high intensities considered in most calculations are only reachable in planned facilities by tightly focusing the laser energy not only in time but also in space. A novel approach [2], based on the assumption that the energy of the involved charged particles is the largest dynamical energy scale in the problem, allows to relax this hypothesis and paves the way for the calculation of QED processes in fields with generic spatiotemporal structure. Here we will show the practical feasibility of this method for two elementary QED processes, namely nonlinear Breit-Wheeler pair production [3] and nonlinear Compton scattering. The rates for these processes show significant quantitative deviations with respect to the analogous results in a plane wave, and the corresponding results could be important for the design of experiments aiming at measuring these processes.

[1] A. Di Piazza et al., Rev. Mod. Phys. 84, 1177 (2012).
A. Di Piazza, Phys. Rev. Lett. 113, 040402 (2014).
A. Di Piazza, Phys. Rev. Lett. 117, 213201 (2016).