Ok, I see that there is no way to generate an entangled photon without destroy a direct observation of interference pattern. But interference still persists as a "second order" phenomena only appreciable trough a coincidence counting.
Ok, this is the point where I'm lost. I thought that the superposition of different states could be canceled if the experiment is modified to ALWAYS destroy the "Which-path" information. If the experiment ALWAYS destroy the "which-path" information then there is no superposition of states...
Thanks
thank you for your clarification, I'm not an expert and I'm full of misconceptions about quantum mechanics.
About the point 2 I still have a doubt, if there is an interaction it could not be physical because detector is unaffected, obviously it's not related to human observation...
I have some questions about double slit experiment.
1) Sometimes photons or electrons should bounce off the initial barrier and nothing should be detected in the plate.
¿Is this correct? i find a video saying that NOTHING is detected in the barrier, only in the plate.
2) If we put 1...