QUANTUM EXPERIMENT:
Take a diamond crystal, doesn’t matter natural or man-made, nor does size matter.
Split it in two pieces.
Take one piece to the other side of town or the Earth, or the International Space Station.
Use a laser or other suitable directed energy device to illuminate the stationary piece you retain. Use Morse code or some pre-determined signal to initiate a message unknown to the other end.
Use a suitable detector connected to the other piece wherever it happens to be and see if any signal of any sort is transmitted and can be decoded.
If Quantum Entanglement is a ‘thing’, then you should be able to receive and decode the message at the other end....................
“If Quantum Entanglement is a ‘thing’, then you should be able to receive and decode the message at the other end.”
And you could, if ALL the particles in both packages end up paired with each other and entangled. Just physically splitting something like that will not make all the particles of one package pair and entangle with all the particles of the other package. It would have to be done with some pretty sophisticated particle level electromagnetism to end up with two identical entangled packages. And here is where “their” tech may be thousands of years ahead of ours making it possible for them but not even fathomable to us.