Sewell, G. L. Quantum plasma model with hydrodynamical phase transition (40K, TeX) ABSTRACT. We derive the electro-hydrodynamics of the Jellium plasma model from its many-particle Schr\"odinger equation, subject to certain general initial and regularity conditions, and prove that it undergoes a transition from deterministic to stochastic flow when a certain parameter, representing the non-uniformity in the initial density and drift velocity profiles, reaches a certain critical value. Thus, the model exhibits a phase transition far from equilibrium.