Web Material:  Two-Level Systems (A Spin 1/2 particle) Spin 1/2 A spin 1/2 particle in a uniform magnetic field A general study of a two-level system Unstable states

	Additional Material: Reading:  Sakurai, Chapters 1.4 and 2.1, Cohen-Tannoudji, Chapter 4 and Complements AIV-GIV and FIV and HIV.
	Assignment: Assignment 9 Solutions