Upcoming and planned experiments combining increasingly intense lasers and energetic
particle beams will access new regimes of nonlinear, relativistic, quantum effects. This …

The dynamics of charged particles in electromagnetic fields is an essential component of
understanding the most extreme environments in our Universe. In electromagnetic fields of …

Abstract This Conceptual Design Report describes LUXE (Laser Und XFEL Experiment), an
experimental campaign that aims to combine the high-quality and high-energy electron …

Charged particles accelerated by electromagnetic fields emit radiation, which must, by the
conservation of momentum, exert a recoil on the emitting particle. The force of this recoil …

Since the invention of chirped pulse amplification, which was recognized by a Nobel Prize in
physics in 2018, there has been a continuing increase in available laser intensity. Combined …

The locally constant field approximation (LCFA) has to date underpinned the numerical
simulation of quantum processes in laser-plasma physics and astrophysics, but its validity …

The local-constant-field approximation (LCFA) is an essential theoretical tool for
investigating strong-field QED phenomena in background electromagnetic fields with …

By considering radiative corrections of up to 3rd-loop order, Ritus and Narozhny conjectured
that the proper expansion parameter for QED in a strong constant crossed field is g= α χ 2/3 …

Strong background fields require a nonperturbative treatment, which is afforded in QED by
the Furry expansion of scattering amplitudes. It has been conjectured that this expansion …

Analytical calculations of radiative corrections in strong-field QED have hinted that in the
presence of an intense plane wave the effective coupling of the theory in the high-energy …