Mladen comments on Configurations and Amplitude - Less Wrong
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Hi, I'm the kind of guy I think this article was meant to target - I did not have an understanding of QM, but did start with enough base knowledge to follow the article without tripping over language or math in it.
I must say that I fried my brain trying to decipher what you're trying to say. From one paragraph to the next, there's a constant feeling a big hidden mental leap has been made. All of a sudden, one is left lost between notions that were introduced, but never explained.
For example. In Figure 3, from prior knowledge, I would suppose if you counted individual photons, they'd ALL end up in detectors 1 and 2 (none would be absorbed by obstacle) - this goes to explain what in fact happens when we think a particle "knows" where it's going to end up. Please correct me if I'm wrong here.
It should also be equally possible to explain the logic behind the quantum eraser - my intuition tells me that for some reason the information that "evades" us would, given better understanding, simply be a configuration that was not possible, and it should be clear what the link between the hidden information and the way configurations work is.
You are. If you were to put a detector 3 there instead of an absorber, it would go off half the time, and detectors 1 and 2 would each go off a quarter of the time.
Are you implying that the presence of a detector instead of an obstacle changes what the other detectors detect, or not?
The text is unclear here:
Does "half the time" mean "half the time that any detector goes off", or "half the time you shoot a photon"? I would expect that, with the obstacle in place, half the time you shoot a photon no detector would go off, because the first mirror would deflect it into an obstacle. Seeing no detector go off is distinct and observable, so I don't see any way it could be eliminated as a possibility like the other case described here where two possible timelines that lead to the same world interfere and cancel out. So I would assume Eliezer means "half the time that any detector goes off". If so, I'd like to see the text updated to be more clear about this.