  Jets are a promising way to probe the non-equilibrium physics of quark-gluon
plasma (QGP). We study how an out-of-equilibrium medium induces a jet particle
to emit gluons. Evaluation of the emission rate is complicated by Weibel
instabilities which lead to an exponential growth of chromomagnetic fields.
Deriving a quantum field theoretical description of an unstable QGP medium, we
show that the chromomagnetic fields deflect jet particles during the gluon
emission.
