Goals

• Obtain an expression for the amplitude of oscillation of the quantum field oscillators as a function of radius from a single stationary electron, assuming there is nothing else in the universe.
• Prove the uniqueness of the QED Lagrangian.
• Explain how representation theory creates a physical difference between singlet and triplet atomic states.
• Explain the non electromagnetic-like terms in the linearized gravitational force law.
• Explain why the Yukawa-Wick argument uses E=mc^2 instead of the relativistic form.
• Understand Ohanian's "What is Spin?" paper.
• Explain why even spin mediators are always attractive.
• Derive the gauge transformation rule for fields from the concept of gauge transformations in EM.
• Prove the theorem about the metric and fully anti-symmetric tensor being the only relativistic invariant tensors.

Other Quips

• Spin tells you the number of indices
• Anything that can happen does happen (list some examples)
• There is no tree level flavor-changing neutral current (experimental fact, but is there a theoretical reason?)