Four-Field description of fast nonlinear reconnection of m=1, n=1 modes

The full nonlinear evolution of a four-held plasma model with vanishing resistivity reveals that the eventual nonlinear saturation regime is markedly different from extrapolations suggested by investigations of the early nonlinear stage, and that topological transitions akin to filamentation in pressure and current density occur, driven by the nonlinear evolution of the fluid motion.