Experiments generate quantum entanglement over optical fibres across three real cities, marking progress towards networks that could have revolutionary applications.
Experiments generate quantum entanglement over optical fibres across three real cities, marking progress towards networks that could have revolutionary applications.
It pisses me off that they're calling quantum data transmission quantum entanglement, it's not the same thing and it's misleading as fuck.
Quantum entanglement is about two quantum particles sharing the same state which if implemented somehow would allow for universal communication with no time lag. Sending quantum state communication through fiber optic, while an achievement for distributed quantum computing, is not quantum entanglement!!
Quantum entanglement communications also have fundamental problems that will likely render them effectively unusable. You need a key to decrypt anything you send, and the key has to travel no faster than c. It's impossible to tell the data from the noise without the key. Attempting to read the data or to change the data being sent also collapses the effect, which can only be fixed by bringing the two systems together. In short, you can only send a single packet of data and you can't use it without a key transmitted using traditional methods.
TL/DW: A big misconception here has to do with Quantum entanglement. Quantum Entanglement in Quantum Internet doesn't mean that you can transfer data at speeds faster than light.
It's true that this connection would be "ultra secure" but this would be very inefficient (slow) and it wouldn't be reliable in a noisy environment. It would probably be most useful for some sort of authentication protocol/key sharing.
“Almost unbreakable keys” - I’m not up to speed on what this race entails, relative to the current state of affairs. Does “almost” mean “any gov agency w/ a budget and quantum computers” can break it, it is it an actual step forward from the status quo?
A question worth asking, in context of article.
There’s not a ton of stuff I demand to be secure, full stop, but SSH and comms w/ my wife are among them. I need to dive deeper, and understand the actual risks.