Pair Production in a Time Dependent Magnetic Field

Abstract

The production of electron-positron pairs in a time-dependent magnetic field is estimated in the hypotheses that the magnetic field is uniform over large distances with respect to the pair localization and it is so strong that the spacing of the Landau levels is larger than the rest mass of the particles. This calculation is presented since it has been suggested that extremely intense and varying magnetic fields may be found around some astrophysical objects.Comment: 11 pages, Plain TeX, no figures. Submitted to Modern Physics Letter