No, it hasn't.
Also, re: this image[0], I thought entanglement couldn't be used to send information? Isn't this complete nonsense?
[0] https://media.nature.com/w800/magazine-assets/d41586-018-018...
Also, re: this image[0], I thought entanglement couldn't be used to send information? Isn't this complete nonsense?
[0] https://media.nature.com/w800/magazine-assets/d41586-018-018...
If you have two entangled coins, you know that the second coin came up heads, if your coin came up tails. You can't transmit information that way, because if you'll force your coin to land heads, you'll break entanglement. But you can use the results of coin flips as a cipher.
You can not transfer the state of the qubit over a classical channel. You need both a classical channel and entanglement. Or in other words: a bit can be send over a classical communication channel (by copying it), but to transmit a qubit (which can not be copied due to its quantum nature), you either need to carry the physical qubit over, or use entanglement together with classical communication.
Plus we get to keep cause and effect ordered, as a little bonus.