The main objection to FTL communication is one draped in archaic thinking. This occurs in science because scientist get stuck on Newton, then when
Einstein comes along there's resistance to accept what he's saying. Then Quantum Mechanics comes along and of course there's resistance. We're
seeing that same resistance today in many of the cutting edge theories that I believe will be the Quantum Mechanics of tomorrow.
With FTL communication, people get stuck on Einstein saying you can't travel faster than light. Well, FTL communication and Einstein are correct
because with FTL communication nothing is moving through space-time faster than light. FTL occurs because of quantum entanglement. Specifically
A paper was published in Nature about this and it's self explanatory when it comes to FTL Communication.
The basic setup goes like this:
Both pairs of photons are entangled, so that the two particles in the first set are entangled with each other, and the two particles in the second set
are entangled with each other. Then, one photon from each pair is sent to a person named Victor. Of the two particles that are left behind, one goes
to Bob, and the other goes to Alice.
But now, Victor has control over Alice and Bob's particles. If he decides to entangle the two photons he has, then Alice and Bob's photons, each
entangled with one of Victor's, also become entangled with each other. And Victor can choose to take this action at any time, even after Bob and
Alice may have measured, changed or destroyed their photons.
"The fantastic new thing is that this decision to entangle two photons can be done at a much later time," said research co-author Anton Zeilinger,
also of the University of Vienna. "They may no longer exist."
The great thing about this is Bob and Alice's particles have never interacted with each other. So you have correlated and uncorrelated which would
act as 1's and 0's.
Let's say Victor is on a planet 10,000 light years away. Bob and Alice would have to be together on the same computer. They say:
101100 = dog
100110 = cat
Could Victor send Bob and Alice the words cat or dog faster than light? Yes they can.
If Victor has 6 particle pairs on his planet 10,000 light years away, he can then send Bob and Alice the word dog or cat. Let's say he wants to send
Victor would do this. He would entangle the first pair, he would choose not to entangle the second pair, he would then entangle the next two pairs and
he would choose not to entangle the last two pairs.
When Bob and Alice check their particles pairs, they would see:
correlated, uncorrelated, correlated, correlated, uncorrelated, uncorrelated or 101100 which = dog.
The beauty of this is causality will be preserved because nothing is actually moving through space-time faster than light.
The author even talks about how this could be used for communication between quantum computers.
"The idea is to create two particle pairs, send one to one computer, the other to another," Zeilinger said."Then if these two photons are
entangled, the computers could use them to exchange information."
Again, people will say they don't fully understand quantum entanglement but in the next breathe say but I know FTL communication is impossible via