Submitted 9 hours ago by throws_lemy@reddthat.com to technology@lemmy.world
“Teleporting quantum information is now a practical reality,” asserts Deutsche Telekom. The firm’s T‑Labs used commercially available Qunnect hardware to demo quantum teleportation over 30km of live, commercial Berlin fiber, running alongside classical internet traffic. In an email to Tom’s Hardware, Deutsche Telekom’s PR folks said that Cisco also ran the same hardware and demo process to connect data centers in NYC.
I would like to know what the advantages are. I mean whats the point?
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.
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
Not just latency, but any connection at all. Somewhere there’s no signal, like in a submarine.
automated quantum stock trading in 5….4….3….2….1…
Is there a quantum block chain for crypto currency yet?
As far as I understand this, it’s not zero latency, it’s safer key exchange possible for some encryption based on a physical and not mathematical principle.
Would be cool, of course, if they really could achieve zero latency. That could do wonders to various infrastructure efficiency. Say, allow for electric grids and internet backbone lines to know of spreading load changes to optimize for them.
There’s going to be latency because the NIC on both ends still communicates with copper to the rest of the computer system(s.)
Still going to be faster than a fiber connection or copper. Not to mention the latency induced by say the IEX Magic Box.
givesomefucks@lemmy.world 8 hours ago
Bit disingenuous to talk about teleporting things along a fiber line…
Also shows a fundamental misunderstanding of how quantum entanglement works…
But it’s actually pretty huge that they’re able to do this.
School_Lunch@lemmy.world 8 hours ago
As someone who also doesn’t fully understand quantum entanglement… is it that when two particles are entangled and far apart, when we observe them they will always be in the same state? Is there any way to manipulate that state? If so, it seems like it would be pretty straight forward to use it for faster than light communications.
givesomefucks@lemmy.world 8 hours ago
Yep
The thing is if it’s entangled, why is there a fiber cable?
If it’s teleportation, why is there a cable?
However what actually makes consciousness in a brain is (hypothetically, technically) microtubules forming a very tiny cable inside of which quantum superposition is able to be maintained while we are conscious. When even brief quantum entanglement used to be insanely hard.
Like, it’s hard to tell what really happened from OPs article. But there should be much better articles explaining it, and this could actually end up being crazy important. Like, 20-30 years from now this might be how we finally get a real AI.
rah@hilariouschaos.com 7 hours ago
The two particles are in different but directly related states. For example in some circunstances with two entangled photons, it will necessarily be the case that one photon has horizontal polarisation and the other vertical polarisation. The two will never have the same polarisation.
You can’t know which photon is in which state without measuring one. The effect of taking the measurement travels faster than the speed of light. Measurement is not modifying though; you can’t say “I want this photon to be measured as vertically polarised”, you can only ask “what is the polarisation of this photon?”. So you can’t transmit information faster than light, unfortunately.
Encephalotrocity@feddit.online 7 hours ago
They will be an opposite states of each other the moment observing collapses their waveform. This effectively removes their entangled state. It cannot be used to communicate information faster than c.