“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.
So there’s a lot of incorrect assumptions and outright wrong ideas of how quantum entanglement is going to be used in a quantum network, or even a quantum Internet.
A hard rule: information cannot be sent faster than the speed of light.
When news articles try to summarize quantum teleportation, they incorrectly imply that information is being transmitted instantly. Quantum entanglement is not intended to send information. It’s meant to act like a hash or checksum. The magic in it is it enables both sender and receiver to know that their communication has been tampered with.
It has further use with encryption, but again, it’s to facilitate the encryption. The information is still being transmitted as light through the fiber network.
Quantum cryptosystems don’t move data faster than light but the payload is ‘teleported’ as in the data isn’t sent over the connection.
The entangled states are sent in such a way that when combined with previously transmitted qbits and sampled, the data appears at the receiving end without it ever going through the intermediary (a bit of handwavery because nobody actually understands quantum mechanics, especially physicists.
It is teleportation but not in a way that is FTL, all of the components of the data transmission obey the laws of physics… we just live in a world where the laws of physics allow for some weird and unintuitive shit.
You’re not wrong in that the connection’s security is absolute, any attempt by an attacker to read the data would disrupt the entangled states in unexpected ways which will result in an essentially random output. So if you’re getting data through the link then you know 100% that it is not being intercepted. It isn’t possible to copy quantum states for spooky physics reasons, so there is no such thing as a quantum wire tap.
They do everything, just to avoid direct peering with Cloudflare
The firm’s T‑Labs used commercially available Qunnect hardware to demo quantum teleportation over 30km of live
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.
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.
when we observe them they will always be in the same state?
The two particles are in different but directly related states. For example in some circumstances 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 manipulating 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.
90% accuracy is the difference between arriving safely at your destination and arriving as a headless corpse.
this is teleporting photons, not atoms.
though, this may actually be a step towards true holographic technology if they can teleport the photons in space and not just between consumer and emitter.
This is about “teleporting” information not physical material (if my understanding is correct)
What do you think teleporters do? They don’t physically move your body - they dismantle it and reconstruct a copy at the destination. The middle step is the moving of information. Transportation like in Star Trek is basically magic - The Fly is more accurate., and the fact that it failed to differentiate between the two organisms is a demonstration of a horrendous flaw in the technology. Although realistically he would have come out the other side as a gooey heap, because his DNA would have also been scrambled with the DNA of every microbe on his skin, his entire gut biome, and even the his eyelash worms - look it up.
Seriously, a person is a disgusting ecosystem just filled with all kinds of crazy shit. And that’s not even accounting for the cells in you with random-ass mutations from DNA transcription errors.
The only way for it to actually work world be to analyze the location and connections of every atom in the scanning area and then send that information to a machine that rebuild the scanning area exactly the same. And if you don’t destroy the original, you didn’t transport anything - you copy it.
automated quantum stock trading in 5…4…3…2…1…
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.
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.
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.
So…not entanglement at all, then.
Well, it is still using entanglement. It’s just not using it to transmit the data. More like a checksum.
