3 ms·
Unfortunately the initial entangling still requires physical contact (provided by proxy of the photon on the optical fibre in this case). Further more, once en
by hetman 15y ago
Unfortunately the initial entangling still requires physical contact (provided by proxy of the photon on the optical fibre in this case).
Further more, once entangled, it is still not possible to transmit information (in the way we think of it every day) faster than the speed of light. This would break causality as we understand it.
What quantum teleportation allows is the instantaneous transmission of quantum information between the entangled particles. I.e. the superposition of all possible states can be made the same at both ends. However it is still not possible to know which of these states actually represent the classical information we were interested in. Hence classical information can't go as fast as quantum information.
This is as best I understand it though it would be nice have get an expert to further expand on this.
- leot 15y agoAFAIK, the reason why entanglement doesn't permit instantaneous information transfer is that, by definition, the quantum state is unknown before you observe it. While, by observing it you instantly know both sides of the entangled pair, this information itself requires conventional communication to the other party in order to be useful, thereby again restricting communication to the speed of light.