7 ms·
Yale researchers 'teleport' a quantum gate
- tuananh 8y agocan anyone ELI5 what's the impact of this research?
- vtomole 8y agoQuantum computers are difficult to scale because of noise. Applying a quantum gate to a qubit using teleportation is a protocol for performing fault-tolerant quantum computation.
- hellweaver666 8y agoI don't know what 5 year olds you hang out with, but I think this would have gone over their heads ;)
- scandox 8y agoOn Hacker News everybody's five year old kids: 1. Configure and run their own Minecraft Server 2. Are fully proficient with the linux commandline 3. Are skilled in basic safe cracking techniques such as auto-dialling, weak point drilling, scoping and the use of brute force methodologies including the use of thermal lances (having acquired relevant Health and Safety accreditations).
- jacquesm 8y agoAnd besides that they are on their third startup, have a blog, will debate the finer points of faking it until you make it with gusto, and are proficient in LISP, Rust and Elixir.
- rikkus 8y agoAnd will explain monads to their parents
- jacobush 8y agoWhich is why we got them in the first place! Failure to contain I mean.
- jhabdas 8y agoSo did any of these five year olds notice this sentence? > Using a theoretical protocol developed in the 1990s, Yale researchers experimentally demonstrated a quantum operation, or “gate,” without relying on any direct interaction. They're basically saying it's magic. But no 5 year olds I hang out with are any good at magic yet.
- vtomole 8y agoQuantum teleportation is the transmission of a quantum state using an entangled pair and two classical bits. No magic needed.
- deleted 8y ago[deleted]
- kowdermeister 8y agoIt's a huge step for building the next generation of computers. Imagine you want to listen to your favorite music in a very busy street with lots of cars and people without headphones. Not very enjoyable. These guys figured out a way to suppress all noise with a special headphone. They move the information from your phone directly to your ears. That's obvious for you I suppose, but it was really hard to do that on vert very small scales these computers operate on.
- dschuetz 8y agoThat's nothin'! Haven't y'all heard of quantum state of matter? https://phys.org/news/2018-09-scientists-tuneable-quantum-state.html https://phys.org/news/2018-09-scientists-tuneable-quantum-st... > An international team of researchers led by Princeton physicist Zahid Hasan has discovered a quantum state of matter that can be "tuned" at will—and it's 10 times more tuneable than existing theories can explain. x10 times more tuneable than other theories can explain! amazing! marvelous! gigantous! give us money!
- nbourbaki 8y agoThe article mentions that quantum computers are “an order of magnitude” faster than traditional computing. My understanding is that at the moment, this is incorrect: (noise-free) quantum computers are better at certain specific tasks, and otherwise, are no better than classical computers.
- chalst 8y agoThe article: > Fully useful quantum computers have the potential to reach computation speeds that are orders of magnitude faster than today’s supercomputers. It's not talking about the present, where IIUC quantum computers are basically useless for anything but research, not performing as well as classical computers because of noise and shortage of qubits.
- deleted 8y ago[deleted]
- mfukar 8y agoYour understanding is correct.
- etatoby 8y agoThe "order of magnitude" statement is completely false. If we're talking about algorithmic complexity: for some algorithms quantum computers won't be any better than classical ones; for others, the improvement will be exponential, not multiplicative, say from O(eⁿ) to O(n). If we're talking about actual performance, we have no idea, because there is no general purpose quantum computer yet. So the mention of "orders of magnitude" belies a complete ignorance of the topic.
- deytempo 8y agoQuantum computers will likely be hybridized with classical computers, meaning classical computers will just become really good at processing quantum algorithms as well. It really wouldn’t make sense to have a purely classical or purely quantum computer at the point where both technologies are available.
- etatoby 8y agoI'm looking forward to the first quantum computer with hundreds or thousands of qubits, to see how the Many Worlds deniers explain its existence.
- ramijames 8y agoEXPLAIN?
- etatoby 8y agoSorry, I was being too brief. Basically, the equations of quantum Physics are fixed, but there are many ways to "interpret" or give meaning to them. The classical one, called Copenhagen, asserts a "wavefunction collapse" that would happen on ill-defined conditions, and is problematic as we find experimentally larger and larger quantum systems. Another interpretation, Many Worlds (or its more mathematically rigorous form, Decoherence) does not introduce any new concept other than the basic quantum physics equations and has no problem with large systems. In fact, under the Decoherence / Many World interpretation, the entire universe is a single quantum system that has been evolving according to the wave functions since the beginning of time. I've written more about it above.
- beaconstudios 8y agowavefunction collapse? My (layman's) understanding is that the Many Worlds theory is just an explanation for why quantum mechanics appear non-deterministic, (that they actually are deterministic, just that branching universes are created for each outcome and our experiential continuum is in only one of them) rather than the assertion that they are non-deterministic.
- etatoby 8y agoMostly, yes. But "wavefunction collapse" is an ill-defined, non mathematical concept that will not stand the test of bigger and bigger quantum systems. See my more elaborate comment above.
- pure-awesome 8y ago
- nosjwshere 8y agoi'm not sure they know what teleportation means, it's like saying a radio signal "teleports" a voice around.