The fiber is there because the data is being sent through the fiber as photons like usual. There is no zero latency happening at all and it will not allow rovers to be controlled remotely in real time. That would break causality. This has more to do with encryption and the inability to wiretap without detection.
Theoretically, zero latency. If you don’t have to wait for a photon to get all the way from one end of a line to another, that can improve a lot of things.
I’m not sure what the fiber is doing here, but if they can get it working without that, they could drive rovers around Mars in real time, instead of waiting the 4-24 minute delay each way when sending/receiving signals.
Or streaming video games could be actually playable instead of frustrating messes.
slackassassin@piefed.social 2 weeks ago
ParlimentOfDoom@piefed.zip 2 weeks ago
So…not entanglement at all, then.
slackassassin@piefed.social 2 weeks ago
Well, it is still using entanglement. It’s just not using it to transmit the data. More like a checksum.
frongt@lemmy.zip 2 weeks ago
Not just latency, but any connection at all. Somewhere there’s no signal, like in a submarine.
HubertManne@piefed.social 2 weeks ago
Have we ever actually proved it can exceed the speed of light in information travel? I swear I have seen stuff where its theorized the speed of light is also the speed of causality
MatSeFi@lemmy.liebeleu.de 2 weeks ago
Nope, the actual information must still be transported via a classical no quantum (and trusted) channel so that both ends can match their statistics and thus deduce the crytographic keys from the qunatum signals. And thats it what its all about: key exchange
HubertManne@piefed.social 2 weeks ago
thanks. I had forgotten about that I think mainly because I can’t wrap my mind around how it works like if its intercepted and used then it will confirm that its void and produce a new one or such.
mech@feddit.org 2 weeks ago
Yes. If you could transport information faster than the speed of light, it’s easy to find examples that break causality, where an observer sees a message arrive before he sees it being sent.
ParlimentOfDoom@piefed.zip 2 weeks ago
It’s argue that that would be breaking our ability to properly interpret causality, not that causality itself breaks. Things still occur in the order they happen regardless of what order we see them happen from different perspectives.
mech@feddit.org 2 weeks ago
No, not if the observer can see the message arrive first, and immediately send a faster than light signal to the sender that turns off their transmitter, preventing the sending of their message.