Abstract
We numerically calculate anomalous resistivity in electron-positron plasmas with a constant external electric field. The external electric field can accelerate particles to create a runway distribution for electrons and positrons. Due to the counterstreaming of electrons and positrons by the acceleration from the external electric field the Buneman instability with both longitudinal modes and transverse modes is excited. Plasmas are destabilized through wave-particle interaction. The effective collision frequency, which sets the anomalous resistivity, increases proportionally with the drift velocity in the low drift velocity regime. For larger drift velocities the effective collision frequency increases only weakly as further increases in the drift velocity.
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