  The quark gluon plasma as produced in heavy ion collisions is exposed to
early anisotropies in momentum space due to its rapid expansion. Such
anisotropies can lead to non-abelian plasma instabilities, driven by unstable
gluonic modes that can grow exponentially fast. These plasma instabilities can
be simulated using a discretized version of gauge-covariant Boltzmann-Vlasov
and Yang-Mills equations. In the stationary case, a turbulent cascade forms in
the strong-field regime, which is associated with an approximately linear
growth of energy in collective fields. Early longitudinal expansion slows down
the growth of unstable modes, and the formation of soft gluonic fields depends
crucially on the initial conditions assumed.
