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
Edit 2: seems my understanding was way off, but I’m leaving this comment up for the sake of context for the replies.. Thanks to the people that responded for trying to clear things up. Quantum physics is weird.
Ah yeah kinda, The two particles would be in a super position state. Meaning that there could be a number of possible states and each state has a certain probability.
The reason quantum entanglement is so weird, Is that by measuring one Particle changes the state of the other particle, it is in fact spooky action at a distance. How these particles communicate with each other is unknown but we cannot use it as a communication method because the act of measuring one of the particles destroys the entanglement. The states of the particles are random before we measure it. There is no state at which both particles agree upon before they're separated.
When the two particles are entangled, no "information" is communicated. So we can think of it as The particles exchanging random information that has no use to anything. This solves the faster than light communication problem because no real information is sent, Only random data. They're experiments that try to test this hypothesis called the quantum eraser.