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 …

The field of laser-matter interaction traditionally deals with the response of atoms, molecules,
and plasmas to an external light wave. However, the recent sustained technological …

We review common extensions of particle-in-cell (PIC) schemes which account for strong
field phenomena in laser-plasma interactions. After describing the physical processes of …

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

A detailed analysis of the photon emission spectra of an electron scattered by a laser pulse
containing only very few cycles of the carrying electromagnetic field is presented. The …

The scattering of temporally shaped intense laser pulses off electrons is discussed by
means of manifestly covariant quantum electrodynamics. We employ a framework based on …

The nonperturbative electron-positron pair production (Schwinger effect) is considered for
space-and time-dependent electric fields E→(x→, t). Based on the Dirac-Heisenberg-Wigner …

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 …

Vacuum birefringence is governed by the amplitude for a photon to flip helicity or
polarization state in an external field. Here, we calculate the flip and nonflip amplitudes in …