Dynamical Reduction?
If it occurs: When and Why?
- Large sizes? No: large superconductors
- Large distances? No: photons 20km apart
- Energy differences? No: see ?E interferences
- Spontaneous? (GRW) ad hoc
- Mind? (Wigner, Stapp) cat? virus?
- Gravity: is spacetime classical? (Penrose)
Scope for new physics!? ? tests ongoing.
- Any law should be Lorentz-invariant!