Forest FermiGoldenRule Notes

Fermi's Golden rule is used to calculate the probability (per unit time) of a quantum mechanical transition between two quantum states. Although Fermi first coined the term "Golden Rule", Dirac developed most of the machinery.

[math]| M_{i,f}| ^2 = \int \psi_i^{*} H_{pert} \psi_f dv[/math]