Quantum Theory Bends the Limits of Physics, Showing Two-Way Signaling May Be Possible

[#1]

“A single photon, or particle of light, can be used to get a message to two people in the same time it would normally take the signal to get to just one.

“Further down the line, not only could quantum communication prove to be much more secure than the systems we have today, it could also be significantly faster, according to the researchers behind the new study.”

https://www.sciencealert.com/two-way-communication-one-quantum-particle-superposition

[#2]

If you want to start to understand what quantum mechanics is, this may be a good start:

[#3]

Good link. Thanks.