Superluminal particles like hypothetical tachyons allow faster-than-light communication. Superluminal communication is interesting because of the information. That stored in a qubit has no time to change if a particle travels faster than light. One of the reasons for that is that superluminal communication requires a quantum channel that isolates the qubit from outside space. What means faster-than-light? It is a situation where a particle travels faster than usual. The idea is that in electromagnetic vacuum photons and other particles travel at the same speed. Superluminal communication is not faster-than-light communication. It's a communication where an information transporter travels faster than a photon transporter particle travels in normal space. For superluminal communication, the system creates a quantum channel. And then that channel allows photons, electrons, or some other particle to travel faster than they travel otherwise. If the particle travels in a wormhole or q