  We study the current of chiral charge density in a Dirac semimetal with two
Dirac points in momentum space, subjected to an externally applied time
dependent electric field and in the presence of a magnetic field. Based on the
kinetic equation approach, we find contributions to the chiral charge current,
that are proportional to the second power of the electric field and to the
first and second powers of the magnetic field, describing the interplay of the
chiral anomaly and the drift motion of electrons moving under the action of
electric and magnetic fields.
