These are my lecture notes from the Quantum Mechanics II course, part of the 2020 Summer School at Peking University, taught by Professor Zhixin Qian.
The notes are organized by chapter, following the structure of the course:
- Chapter 1: Phase in quantum mechanics
- Chapter 2: Path integral formalism of quantum mechanics
- Chapter 3: The WKB approximation
- Chapter 4: The density matrix (not available)
- Chapter 5: Rotation and vibration of molecules
- Chapter 6: Variational principle and two-particle systems
- Chapter 7: Introduction to many-body theory