Time, Randomness, and Correlations in a Quantum Model

How do you know if something is random? If you were a substitute teacher that only taught on Wednesdays, you might interpret a dip in attendance as a random fluctuation. If you taught that same class every single day, however, the dip might signal the tail end of a local flu epidemic that caused even more students to miss class on Monday and Tuesday. Most "random" events are not as random as they appear.If you monitor a system, like a class, in short enough intervals, you'll see that many seemin...