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Topic list[edit]

What is quantum mechanics?
- A curiously exotic set of phenomena.
- theoretical model of very very tiny things.
- Major part of how the universe works.
- strangely: all of the above.
Why is quantum mechanics difficult to understand?
- Quantum world fundamentally different (intro).
  - Invisible, Heavily mathematical, Ubiquity, Different properties.
- Invisible leads to indirect observations.
  - Indirect information: observations.
  - Submicroscopic scale.
  - Macroscopic human senses.
  - Information through interaction.
  - Interaction causes alteration:
    - Observations alter state.
    - Environment alters (decoherence).
- Indirect information leads to models leads to math.
  - Models predicting observations.
  - Numerical observations require mathematical models.
- Limitations of non-mathematical descriptions.
  - Models difficult to explain without math background.
  - Only analogies to directly observable systems.
- Limitations of mathematical description.
  - Bad data to start (unmeasurable initial conditions)
  - Observers obey QM (Heisenberg cut)

Curiously exotic phenomena and our models of very very tiny things.
- Photo electric effect: quanta.
- Photoabsorption: bound states and quantum jumps
- Double slit: interference and matter waves.
- Single slit: interference and yes waves.
- Double slit low intensity: probability.
- Radioactive decay: probability.
- Stern-gerlach: spin
- separate measurements in coincidence: entanglement.

A major part of how the universe works.
- Ubiquity.
- Quantum apparatus; quantum observers.
- Welcome to the edge of the known universe.