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Quantum mechanics

Level 4 (up to Physics M.Sc.)

Advanced Quantum Mechanics III

Here you will learn how to treat complex quantum systems with perturbation theory and how to describe many-body quantum systems with second quantization.

    Level 2 (suitable for students)

    Photoelectric Effect and The Einstein Formula Simply Explained

    Here you will learn what the photoelectric effect is, how it can be described with a Einstein formula + everything you need to know about it.

    Content of the video
    1. 00:00 What is the photoelectric effect?
    2. 00:07 Experiment setup
    3. 00:46 Photons
    4. 01:58 Work function and threshold frequency
    5. 03:48 Convert electron volts to joules and vice versa
    6. 04:19 Kinetic energy of an electron
    7. 04:50 Einstein formula
    8. 05:36 Stopping (braking) voltage
    9. 07:20 Energy frequency graph
    Level 3 (up to Physics B.Sc.)

    Hermitian Operators Simply Explained

    In this physics video you will learn what Hermitian operators and matrices are and what important properties they have.

    Content of the video
    1. 00:00 Motivation: Real mean values
    2. 01:16 What are Hermitian operators?
    3. 02:16 What is a self-adjoint operator?
    4. 02:56 Notation of a Hermitian operator
    5. 03:20 Eigenvalues are real
    6. 04:27 Eigenvectors are orthogonal
    7. 05:56 Eigenvectors form a basis
    8. 06:37 What is a Hermite matrix?
    9. 07:19 Examples for (non) Hermitian matrices