The Macroscopic Evolution in the Measurement Space.

We analyze the dynamics of N-qubit systems in the measurement space under the action of symmetric Hamiltonians. We show that the evolution of the discrete distribution function, representing the global properties of multipartite states, becomes quasicontinuous in the macroscopic limit N ≫ 1. The shorttime dynamics can be approximately described as a propagation along "classical" trajectories in the measurement space. [ABSTRACT FROM AUTHOR]