Preprint Number : ANL - PHY - 9373 - TH - 99 Pair creation : back - reactions and damping
نویسندگان
چکیده
We solve the quantum Vlasov equation for fermions and bosons, incorporating spontaneous pair creation in the presence of back-reactions and collisions. Pair creation is initiated by an external impulse field and the source term is nonMarkovian. A simultaneous solution of Maxwell’s equation in the presence of feedback yields an internal current and electric field that exhibit plasma oscillations with a period τpl. Allowing for collisions, these oscillations are damped on a time-scale, τr, determined by the collision frequency. Plasma oscillations cannot affect the early stages of the formation of a quark-gluon plasma unless τr τpl and τpl ∼ 1/ΛQCD ∼ 1 fm/c.
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