title: Chaos-induced resistivity in collisionless magnetic reconnection.
abstract: Magnetic null points act as scattering centers where particles describe chaotic orbits and the mixing effect increases the kinetic entropy. In an open system where convection of particles into/from the chaos region exists, the saturation of the entropy can be avoided, and continuous dissipation is achieved. The chaos-induced collisionless resistivity of ions enables fast magnetic reconnection. By matching the microscopic (kinetic process) and the macroscopic parameters of reconnection, we obtain a self-consistent model of the diffusion region.
authors.affiliation: Graduate School of Frontier Sciences, University of Tokyo, Hongo, Tokyo 113-0033, Japan.
authors.forename: Ryusuke
authors.initials: R
authors.lastname: Numata
authors.forename: Zensho
authors.initials: Z
authors.lastname: Yoshida