Definitions by Bloop1338
An abbreviation for Bohr Sommerfeld (quantization), which states that for a bound quantum state, the action of its classical equivalent is quantized. An improved version of this method is known as EBK quantization, which includes the phase jump corrections at the classical turning points (the simplest correction is the 1D case, where a factor of 1/2 appears as a result of applying continuity and differentiability near classical turning points).
kam
An abbreviation for Kolmogorov-Arnold-Moser, a theorem in classical perturbation theory. It roughly states that if (among other things) the perturbation applied on an integrable system is small enough, and the unperturbed frequencies have ratios which are sufficiently irrational, the topology of the system will be invariant for that perturbation (In action angle variables, it will remain a torus).
kam
An abbreviation for Kolmogorov-Arnold-Moser, a theorem in classical perturbation theory. It roughly states that if (among other things) the perturbation applied on an integrable system is small enough, and the unperturbed frequencies have ratios which are sufficiently irrational, the topology of the system will be invariant for that perturbation (In action angle variables, it will remain a torus).