Re:The quantum internet has arrived (and it hasn’t)
by IntronExon on Saturday February 24, 2018 @06:25PM
(#16456108)
The essence of the issue for many, who seem to equate entanglement with FTL is that a classical channel is required. Without that, you’re just sending noise over your quantum channel.
Plus we get to keep cause and effect ordered, as a little bonus.
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.