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Electrical Control of Nuclear Spin Qubits: Important Step For Quantum Computing
Taco Cowboy writes: "Using a spin cascade in a single-molecule magnet, scientists at Karlsruhe Institute of Technology and their French partners have demonstrated that a single nuclear spin can be realized in a purely electric manner, rather than through the use of magnetic fields (abstract). For their experiments, the researchers used a nuclear spin-qubit transistor that consists of a single-molecule magnet connected to three electrodes (source, drain, and gate). The single-molecule magnet is a TbPc2 molecule — a single metal ion of terbium that is enclosed by organic phthalocyanine molecules of carbon, nitrogen, and hydrogen atoms. The gap between the electric field and the spin is bridged by the so-called hyperfine-Stark effect that transforms the electric field into a local magnetic field. This quantum mechanical process can be transferred to all nuclear spin systems and, hence, opens up entirely novel perspectives for integrating quantum effects in nuclear spins into electronic circuits"
If it depends on any Stark effects, don't expect it to last long.
I read it, but it all just made me feel dizzy!
Yeah right. That is why you can't buy a quantum computer right now, oh wait.
Come on.
Well, yes, we are still waiting. That's exactly what we have to do, since we can't actually buy a quantum computer at this point in time.
As I write this, the parent comment is the only one visible by default, nearly an hour after this submission was posted. Yet it's totally useless.
Meanwhile, there are several good threads of discussion about the actual topic involving Anonymous Coward commenters, yet they're not visible by default.
It's no wonder Slashdot is on its way out. Total crap, like the parent comment, is visible, while the actual discussion is not. It takes effort to show the useful content.
If it's any consolation, at least there's some good discussion going on here, even if it isn't very visible. It's better than the hipster wankfest that Reddit has become, or the totalitarian censorship-ridden shitpit that HN is today.
Have a look at: http://en.wikipedia.org/wiki/D-Wave_Systems
If you're going to cite something, at least make the effort to read it fully beforehand!
You must have missed the "Controversy" section of that article: https://en.wikipedia.org/wiki/D-Wave_Systems#Controversy
So there are some serious doubts about veracity of the technology in question.
Had you known this, you probably wouldn't have gone ahead and thrown the link out like you did. If it does anything, it's that it provides significant evidence against what you're trying to argue in favor of!
Sure you can. Well, maybe not you *personally*, they're insanely expensive. And we're not yet 100% certain their computations are actually quantum in nature. But they do seem to exist.
--- Most topics have many sides worth arguing, allow me to take one opposite you.
There is an article covering the controversy in the June "Wired."
well, we are 100% certain that the computations are not on the individual quantum bit level. what d-wave claims is to have quantum adiabatic computation, which achieves some quantum speed-up on some optimization problems by (roughly speaking) quantum-parallelizing hill-climbing algorithms.
and it seems so far that they are full of shit, even on that vague claim...
"They were pure niggers." – Noam Chomsky
we have quantum computers with seven qubits, so strictly speaking we do have them already. scaling seems to be an issue, but progress is being made.
and of course we'll still be doing research into them in 50 years. we're still doing research into classical computers after all.
"They were pure niggers." – Noam Chomsky
btw, this was referring specifically to d-wave.
we do have bona fide quantum computers already. it's just that they have so far, at most, 7 qubits, and the registers persist for only ~100 microseconds. but they do exist.
"They were pure niggers." – Noam Chomsky
can we **please** stop calling this tech "quantum computing"?
it's factually inaccurate as it does not use quantum non-locality but two independent things that only act as entangled
the application they are developing it for is cryptography
"quantum cryptography" still has "quantum" in it...it still sounds just as cool as quantum computing and its much more precise
Thank you Dave Raggett
no.
we do not have the ability to initiate or control quantum entangled particles
to be quantum it must be **non-local**
http://en.wikipedia.org/wiki/P...
Thank you Dave Raggett
no, we don't have non-local entanglement...I'm not going to have this discussion...it's not true non-locality, at all
please don't start this...it's becoming like arguing about apple vs microsoft
i have a standard response, one that I saved from another commenter...I will post it if I have to
Thank you Dave Raggett
For an article written by 4 french authors and 2 from the Karlsruhe Intistute?
Whom first author is a french Ph.D student?
Sure, this article seems to have been written by the Karlsruhe Institute communication department.
However, they could have made some efforts to name all scientists involved and not only the head of the Karlsruhe research group.
This needs at least a +3 Funny
who are you, AC?
a logged in user made the post before me...my comment was directed to them
if that logged-in user wants to contribute to the discussion I'll be happy to post it
Thank you Dave Raggett
if you re-read it you'll see that I refused to have a discussion, and ***INSTEAD*** I would post a standard response that describes, with boring detail, why "quantum computing" is really just "quantum" cryptography
I said I would **post that** instead of have a discussion
Thank you Dave Raggett