“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
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
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.
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.
I’d 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.
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.
If they see the message arrive, it has already been sent (and received). Not seeing it get sent yet doesn’t mean it hasn’t happened yet. You’re not accounting for the frame of reference translation involved. Some of the information in your example has travel time. None of that information starts traveling before the things that created that information occurred, though. Even if it might look like that from some perspectives. It won’t look like that to others.
I’m sorry, but all of special relativity disagrees with you.
God damn it, they’re going to use this to force cloud gaming on us.
The lack of affordable consumer: harddrives, ssds, RAM, and gpus will do that long before they get this working.
But latency is the determining factor in cloud gaming, not the hardware. The speed of light is the bottleneck.
I’m aware. It’s a trash experience currently. But that won’t stop them from pushing it anyway, now that personal machines are being priced out of the market.
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.
Quantum is a struggle for me to understand because, I feel like the current explanations don’t suffice why you can’t transmit information. To me, this still sounds perfectly viable for information transfer… just don’t encode information via polarization. You would encode it as a primitive derived from whether or not state collapse has happened yet or not.
Using the same/similar mechanism they can use to determine collapse happens to both entangled particles at the same time (faster than light), can they not also determine whether or not collapse has happened at all?
Maybe it’s that checking for collapse will actually cause collapse, thus ruining the information channel. But, perhaps then, you just add more entangled particles. Have some mechanism established with “throwaway” particles that can have their state collapsed either as a chain reaction or via the polling process.
Obviously I’m not the smarted person here… probably a lot wrong with my above assumption. But my point is really that explanations about quantum seem to be unsupportive to the claims they make about quantum.
AFAIU you can’t determine whether the state on the other side has been collapsed. All you can say with certainty is the state on the other side after you have collapsed yours.
I’d recommend this excellent series if you want a good grounding:
https://www.rigb.org/explore-science/explore/video/arrows-time-back-future-1999
And I also found this video which I haven’t watched but I expect will be good and probably attacks your pondering more directly:
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 anywhere and an environment like the brain considered impossible.
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.
Quick edit:
Like, rather than one straight line to send data, if this can maintain even just entanglement in a simple fiber optic cable…
Then that’s huge.
If they just stretched a string between two containment chambers that each have an entangled particle, then what purpose is the string even serving?
Any source on your claim about consciousness? Sounds very speculative.
what actually makes consciousness in a brain is (hypothetically, technically) microtubules
This is only a proposed theory, it’s very far from accepted fact.
This is only a proposed theory, it’s very far from accepted fact.
Which is why I said hypothetically…
Although up until a year ago the very idea that quantum entanglement could happen in the brain was treated as a joke for like 30 years and that’s why the larger theory was instantly dismissed…
Which is why I added the “technically” as well.
If we’re being technical even gravity is just a theory. But it’s not like being deny the existence of gravity…
Which is why I said hypothetically…
I think you may have misused the word “hypothetically” then.
up until a year ago the very idea that quantum entanglement could happen in the brain was treated as a joke for like 30 years
I was taught Orch OR theory at university about 17 years ago.
that’s why the larger theory was instantly dismissed
Instantly dismissed by who? It’s a new theory, there will always be detractors and critics of new theories (see, for example: oxygen theory of combustion). That’s very different from being “instantly dismissed”.
I think you may have misused the word “hypothetically” then
I 100% did
I was taught Orch OR theory at university about 17 years ago
Then you were also taught that there was no way the brain could maintain sustained quantum entanglement at the same time.
It’s a new theory
I mean, frame of reference…
You said you learned it 17 years ago, that’s not very “new”.
But compared to any other science, all of psychology is incredibly “new”.
I’m multitasking bro, this ain’t that deep
Then you were also taught that there was no way the brain could maintain sustained quantum entanglement
No. I’ve no idea what could have possibly brought you to that conclusion.
Please don’t try to tell me what brought you to that conclusion while multitasking. For that matter, please don’t try to tell me at all.
when two particles are entangled and far apart, when we observe them they will always be in the same state?
They will be 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.
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.
