Helpful info

---

Correspondence principle: In physics, the correspondence principle states that the behavior of systems described by the theory of quantum mechanics (or by the old quantum theory) reproduces classical physics in the limit of large quantum numbers.

Quantum chaos: is a branch of physics which studies how chaotic classical dynamical systems can be described in terms of quantum theory. The primary question that quantum chaos seeks to answer is: "What is the relationship between quantum mechanics and classical chaos?" The correspondence principle states that classical mechanics is the classical limit of quantum mechanics.

*see interesting/fun article: https://pdfs.semanticscholar.org/4587/51ceb926540d24fce9e1608bd6319477102d.pdf