Variational principles provide a powerful and unifying framework to derive the governing equations of systems by optimising an action functional. Traditionally applied in classical mechanics via ...

A general variation method is developed for determining: (a) the magnetic shielding of nuclear spin-spin interactions in molecules; (b) the electron-coupled nuclear spin-spin interactions in molecules ...

This course teaches commonly used approximation methods in quantum mechanics. They include time-independent perturbation theory, time-dependent perturbation theory, tight binding method, variational ...