Please explain to me quantum entanglement.. and can we “ hypothetically “ build a quantum entangled cameras or some sort of optical device one we can observe on and them put this device in a space shuttle or smt then we can observe events in time ?
Let’s just say this device is 1 light years away but it’s entangled with a device here on earth so events will reach us 1 in 1 year or just in time?
In: Physics
> can we “ hypothetically “ build a quantum entangled cameras or some sort of optical device one we can observe on and them put this device in a space shuttle or smt then we can observe events in time ?
Yes, but it wouldn’t do us any good.
To get an entangled system the parts have to start together. Then they spread out. And the point of entanglement is that when you measure something about one of them, you know what the other must be.
So it would be like getting two boxes, and getting a salt and pepper pot, and putting one pot in each box. Then shuffling the boxes. And then sending one of them up into space.
Sure, when you open the box on Earth you know what is in the box up in space. But that isn’t particularly helpful.
The quantum weirdness with quantum entanglement is that until the boxes are opened up (and the quantum system is interacted with) the system is in a combination of each possible state (so rather than the system being “salt on Earth, pepper in Space” or “salt in Space, pepper on Earth”, the system is in the state “0.7 salt on Earth, pepper in Space + 0.7 pepper on Earth, salt in Space).
Essentially the whole system (of both boxes) is one closed quantum system until they are interacted with, at which point the system opens up into classical one.
But that still doesn’t help us that much; we on Earth know something about what is going on in Space that we didn’t know (and couldn’t know) before, but it is still really telling us something about what happened when we shuffled the boxes in the first place. We cannot use that to get information between the boxes.
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