Here are some summaries on specific topics, given to students while TA’ing during my Ph. D. at ETH Zurich.

- Summary on the Density Operator
- Summary on Rotation and Spin
- Summary on Symmetries, Rotation and Spin
- Summary on Electric Field (for Physics lecture to biologists, chemists, pharmacists)
- Summary on Waves, Path integrals, and QM mindset (German with language mistakes)
- Summary on Posulates of QM (based on Cohen-Tannoudji; German with language mistakes)
- Summary on Dirac Delta Function and Fourier Transformation (in an approximation to German)
- Invariance of the Schrödinger Eq. of charged particle under Gauge Transformation
- Short Summary on Bessel Functions
- Summary on Solving the Schrödinger Eq. for a Spherically-Symmetric Potential (approximately German)
- Summary on Scattering (approximately German)
- Summary on Approximation Methods (Ritz Variation method; Perturbation Theory) (approximately German)
- Summary & Diagram on Stationary Perturbation Theory (approximately German)
- Summary on Time-Dependent Perturbation Theory (approximately German)
- Summary on the Tensor Product in Quantum Mechanics (approximately German)
- Summary on EPR Argument and Bell’s Theorem (Entanglement) (approximately German)
- Summary on Smooth Entropies and the I.I.D. Limit

(Disclaimer: No guarantees. Some signs might be wrong and occasionally arguments too sketchy. Double-check with a real book.)