  The description of dynamical fluctuations near the QCD critical point in
heavy-ion collisions is crucial for understanding the existing and upcoming
experimental data from the beam energy scan programs. In this talk we discuss
the evolution of fluctuations of the net-baryon density as given by a
stochastic diffusion equation. We study equilibrium as well as dynamical
systems for which we can show the impact of nonequilibrium effects on the
second-order moment.
