this post was submitted on 30 Aug 2023
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No spooky action at a distance
More like "no measurement without action" and "action = modification" but I get the reference, yes.
Sadly, IIRC, measuring an entangled particle on one end changes the result on that end, despite the other end trying to be the one that changes it.
I don’t think there’s really any “changing” going on. The state of both entangled particles are unknown until one is measured, but I highly doubt that the act of measuring one suddenly determines the other’s state. They were already in those states, but before measurement it was an unknown variable which could be treated as a superposition. Once one is measured, then you know the state of the other entangled particle. Not because the act of measuring one affects the other (see: spooky action), but simply because the nature of entangled particles means the other would have to have to be the opposite of what you measured.
There’s no remote interaction, it’s simply mutual information
At least, that’s my take
Edit: this is why we can’t use entanglement for FTL communication. It just doesn’t work like that
This is a common misunderstanding due to trying to think of things classically. I'd recommend "the road to reality" by Penrose if you want a better understanding.
Also it is not why we cannot use entanglement for FTL info, but you'll understand that more once you understand entanglement better.