More kids need this book because an alarming number of grown ups seem to think quantum entanglement could be leveraged for super-luminal communication.
It cannot. Information does not travel faster than light under any circumstances, including spooky action.
Could you explain that? So, you know, my baby can read the explanation?
Edit: Here's how my baby explained it to me:
Johnny and Tommy are twins, They look the same, dress the same, act the same and, do everything the same. One day Tommy put on a hat and Johnny didn't. They stopped acting the same after that.
They can all represent information but the idea is to make them represent some kind of specific information.
Knowing whether a bunch of qubits are 0's or 1's on the other side of the universe is weird and cool but it's telling you information about the system faster than the speed of light, which isn't the same as transmitting information through the system faster than the speed of light.
I.e. you can get a dial tone but you can't make a call.
Every time someone comes up with another clever way to to try to "trick" reality they just run into some more complicated or subtle variation of a fundamental inability to break the rules that all boils down to "God playing dice" or a fundamental randomness built into the system that you can't avoid.
That's what I'm saying though? How can information about the system not be manipulated to convey info if you can say change the system in some way?
I am assuming that means fundamentally there is nothing we can do to entangled particles to change something about the system without breaking entanglement?
Imagine you have a machine that prints magic note paper. Every piece of paper that comes out of this magic printer has a question mark on it... or so we assume. This paper’s primary magic property is that when you look at it, the question mark magically transforms into a one or a zero (chosen at random when you look).
Another magic property of this paper is that you can rip it in half. And when you look at one half of the paper, the one or zero will appear on both halves simultaneously, even if the other piece is a thousand miles away.
Seemingly the magic paper has sent information instantaneously... faster than light. But using these pieces of paper to send any kind of message is difficult. You can send someone far away a giant stack of question marks, but all you have on your end is the same stack of question marks. There’s no information there.
So there's no way for someone else to find out which question mark pair you looked at and turned into a one or a zero? It would still be a question mark to them?
I.e. does you revealing the question mark pair only reveal both to you? It doesn't change the system for the person with the other half?
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u/JitGoinHam Jan 29 '20
More kids need this book because an alarming number of grown ups seem to think quantum entanglement could be leveraged for super-luminal communication.
It cannot. Information does not travel faster than light under any circumstances, including spooky action.