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.