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Q: Fachverband Quantenoptik und Photonik

Q 39: Quantum effects: Light scattering and propagation

Q 39.5: Vortrag

Mittwoch, 20. März 2013, 15:00–15:15, F 342

Nonlinear double Compton scattering in the full ultrarelativistic quantum regime — •Felix Mackenroth and Antonino Di Piazza — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

An electron scattered from a high-intensity laser field may emit more than one photon. The simplest effect of this type is the emission of two photons [1], labeled nonlinear double Compton scattering (NDCS). We present a detailed analysis of NDCS in an ultra-strong laser field taking the effects of the laser field into account exactly and allowing for an arbitrary temporal laser field shape. We put particular emphasis on the parameter regime where nonlinear and quantum effects such as photon recoil significantly affect the emission pattern. It is demonstrated that due to recoil the energies of the emitted photons are no longer independent. This dependence is explained in terms of a semiclassical model, based on the possibility of assigning separate classical trajectories to the electron in the laser field before and after each quantum photon emission [2]. By virtue of the developed model we identify an experimentally feasible detection scheme for NDCS in the full quantum regime. The accessibility of this regime with already available plasma-based electron accelerator and laser technology is demonstrated by a numerical analysis.
[1] E. Lötstedt and U.D. Jentschura, Phys. Rev. Lett. 103, 110404 (2009).

[2] F. Mackenroth and A. Di Piazza, submitted (see arXiv:1208.3424).