The effect of non-linear quantum electrodynamics on relativistic   transparency and laser absorption in ultra-relativistic plasmas
  With the aid of large-scale three-dimensional QED-PIC simulations, we describe a realistic experimental configuration to measure collective effects that couple strong field quantum electrodynamics to plasma kinetics. For two counter propagating lasers interacting with a foil at intensities exceeding $10^{22}$ Wcm$^{-2}$, a binary result occurs; when quantum effects are included, a foil that classically would effectively transmit the laser pulse becomes opaque. This is a dramatic change in plasma behavior, directly as a consequence of the coupling of radiation reaction and pair production to plasma dynamics. 
Peng Zhang, A. G. R. Thomas, C. P. Ridgers
physics.plasm-ph