Fig. 1. Dependence of on the order of nonlinearity , for coherent (black squares), chaotic (red circles), and squeezed (green triangles) light.

Fig. 2. (a) Dependence of the 11-photon multiphoton ionization of Xe on the intensity of a coherent and stochastic light field operating with 10, 30, 70, and 100 phase-unlocked modes (shown with a, b, c, and d in the graph). (b) Dependence of the harmonic yield, produced by nonlinear processes in a crystal, on the intensity of a vacuum squeezed (solid squares) and a coherent (open circles) light states. Parts (a) and (b) are reproduced from Refs. [57] and [28], respectively.