A new electromagnetic wave in a pair plasma
  A new nonlinear electromagnetic wave mode in a plasma is reported. Its existence depends on the interaction of an intense circularly polarized electromagnetic wave with a plasma, where quantum electrodynamical photon--photon scattering is taken into account. As an illustration, we consider a pair plasma and show that the new mode can be significant in astrophysical settings and in the next generation laser-plasma systems. 
Lennart Stenflo, Gert Brodin, Mattias Marklund, and Padma K. Shukla