What happens after a measurement?
If we measure a ‘system’ described by wave function ?=a1u1+a2u2 to discriminate between the ui, and u1 is found to occur:
What happens after to the ‘unphysical’ u2?
- Equally as real as u1? many worlds/Bohm
- Exists, but has no effect? decoherence
- Dynamically reduced? new physics!