An Introduction to Quantum Theory

Underpinning the axiomatic formulation of quantum theory presented in this undergraduate textbook is a review of early experiments a comparison of classical and quantal terminology a Schroedinger-equation treatment of the one-dimensional quantum box and a survey of relevant mathematics. Among the many concepts comprehensively discussed are: operators; state vectors and wave functions; experimental observables; classical/quantal connections; and symmetry properties. The theory is applied to a wide variety of systems including the non-relativistic H-atom external electromagnetic fields and spin. Collisions are described using wave packets. Various time-dependent and time-independent approximations are discussed; applications include electromagnetic transition rates and corrections to the H-atom energies. The final chapter deals with identical-particle symmetries and their application to the He atom the Periodic Table and diatomic molecules.