- TL;DR Summary
- In a Delayed Choice Quantum Eraser experiment, do we know if paired photons actually arrive at different moments in time?
Considering a Delayed Choice Quantum Eraser experiment such as the one in the picture above:
It is said that paired photons arriving at the detectors A,B,C,or D, reach the detectors after the entangled pair has reached the interference screen.
Are we actually able to measure the time interval between the photon reaching the screen and its entangled pair reaching one of the detectors? How is this measurement made?
If yes, what is the longest interval ever made between these two events?