Random maps in physical systems

We show that functions of type $X_n=P[Z^n]$, where $P[t]$ is a periodic function and Z is a generic real number, can produce sequences such that any string of values $X_s, X_{s+1},\ldots,X_{s+m}$ is deterministically independent of past and future values. There are no correlations between any values of the sequence. We show that this kind of dynamics can be generated using a recently constructed optical device composed of several Mach-Zehnder interferometers. Quasiperiodic signals can be transformed into random dynamics using nonlinear circuits. We present the results of real experiments with nonlinear circuits that simulate exponential and sine functions