In this paper we derive and discuss the completely spin- and photon-polarisation dependent probability rates for nonlinear Compton scattering and nonlinear Breit-Wheeler pair production. The locally constant field approximation, which is essential for applications in plasma-QED simulation codes, is rigorously derived from the strong-field QED matrix elements in the Furry picture for a general plane-wave background field. We discuss important polarisation correlation effects in the spectra of both processes. Asymptotic limits for both small and large values of χ are derived and their spin/polarisation dependence is discussed.
@article{arxiv.2007.11837,
title = {Spin and polarisation dependent LCFA rates for nonlinear Compton and Breit-Wheeler processes},
author = {D. Seipt and B. King},
journal= {arXiv preprint arXiv:2007.11837},
year = {2020}
}