Learn more physics!
Some of the quantum experiments talk of changing the experimental configuration after a photon has be emitted (in flight). How do we know when the photon has been emitted? Cramer's TI (for example) would have us accept the exchange between emitter and absorber is determined before the energy exchange takes place (outside of time).
- Steven MacQueen (age 56)
chobham, surrey, england
The detectors are placed far enough apart so that their changes are rapid compared to the time of flight from the spot where the photon pairs are generated.
I never got a good grasp on the Transactional Interpretation of quantum mechanics. Perhaps in this case the argument is that local causes can lead to Bell violations if those causes are in the future, not just the past. That would still be a rather drastic revision of ordinary local realism.
(published on 02/23/2011)
Follow-up on this answer.