PeterDonis's latest activity

@mcastillo356 what is your question?

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Again, I'm not sure why. Consider an obvious "hidden variable" interpretation of the retrodiction: measuring H for the first photon...

I'm not sure how it "looks local" given that, as @.Scott has already pointed out, the information used does not all lie in a single past...

I'm not sure what you mean by "the same". You're contradicting yourself again. If this is done regardless of whether the system was...

Ah, ok. Then my question would be: which operators? The quantum field operators aren't the ones we actually measure; they aren't...

Then please keep these opinions out of this discussion. They're off topic.

But you said that by "the quantum field", you didn't mean the operators, you meant "the thing that is out there". If "the thing that is...

How is the opposite view inconsistent? It makes all of the same experimental predictions.

No. You have a system consisting of a particle and a measuring device. That's true regardless of what outcome you measure. The sentence...

What in the math of QFT corresponds to "the thing that is out there"?

Yes, that is completely correct. I think his confusion is about this part, which is why I focused on it, but I completely agree that...

Note that in a light clock scenario, this pulse reflects off the second mirror and reverses direction. I don't know that accounting for...

This is easy to address. Photon counting arguments are risky because not all states preserve photon number. A better approach is to...

Clearly, if you start with that presumption, everything is local. But that presumption is wrong. If it was right, there would be nothing...