PHYS 5320 offers an in-depth study of: Quantum Theory of Radiation: Exploring the interaction between matter and electromagnetic radiation, including emission and absorption processes. Relativistic Quantum Equations: Studying equations that merge quantum mechanics with special relativity, such as the Dirac and Klein-Gordon equations. Elements of Quantum Field Theory: Introducing the framework that treats particles as excited states of underlying fields, fundamental in understanding particle physics. Symmetries and Gauge Theories: Analyzing how symmetries lead to conservation laws and exploring gauge theories that form the basis of fundamental interactions. Prerequisite: PHYS 5308 and PHYS 5312.