Quantum Algorithm Breakthrough: True Calculation for the First Time.
39 replies, posted
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[TD][h2]Quantum Algorithm Breakthrough: Performs a True Calculation for the First Time.[/h2][/TD]
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[TD="align: center"][quote][IMG]http://i.imgur.com/dfx69US.png[/IMG][/quote][/TD]
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[TD]An international research group led by scientists from the University of Bristol, UK, and the University of Queensland, Australia, has demonstrated a quantum algorithm that performs a true calculation for the first time. Quantum algorithms could one day enable the design of new materials, pharmaceuticals or clean energy devices.
The team implemented the 'phase estimation algorithm' -- a central quantum algorithm which achieves an exponential speedup over all classical algorithms. It lies at the heart of quantum computing and is a key sub-routine of many other important quantum algorithms, such as Shor's factoring algorithm and quantum simulations.
Dr Xiao-Qi Zhou, who led the project, said: "Before our experiment, there had been several demonstrations of quantum algorithms, however, none of them implemented the quantum algorithm without knowing the answer in advance. This is because in the previous demonstrations the quantum circuits were simplified to make it more experimentally feasible. However, this simplification of circuits required knowledge of the answer in advance. Unlike previous demonstrations, we built a full quantum circuit to implement the phase estimation algorithm without any simplification. We don't need to know the answer in advance and it is the first time the answer is truly calculated by a quantum circuit with a quantum algorithm."[/TD]
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[TD][B]Journal: [/B] Xiao-Qi Zhou, et al. Calculating unknown eigenvalues with a quantum algorithm.
Nature Photonics, 2013; DOI: [URL]http://dx.doi.org/10.1038/nphoton.2012.360[/URL][/TD]
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[TD][B]SOURCE: [/B] [URL]http://www.sciencedaily.com/releases/2013/02/130224142829.htm[/URL][/TD]
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That JPEG, they can't be serious
That's cool and all, but THIS time, in English please.
eh?
well the avatar fits. anyway i hope it does come to cleaner energy and devices
This was actually submitted to arxiv in 2011.
[URL]http://arxiv.org/pdf/1110.4276v1.pdf[/URL]
But I'll keep the thread open since it just got published on the journal.
[editline]25th February 2013[/editline]
Anyone who wants a[B] layman explanation [/B](of the[B] [U]Shor Algorithm[/U][/B]), read this:
[URL]http://www.scottaaronson.com/blog/?p=208[/URL]
[QUOTE=Elecbullet;39709834]That JPEG, they can't be serious[/QUOTE]
There, I downloaded the journal, screencapped, cropped the photo, uploaded it..
Now, the question is..
Does it help you understand more, or less? :v:
I was waiting for the image to finish loading before I started reading
There goes 5 minutes of my time :(
[QUOTE=Bradyns;39709878]There, I downloaded the journal, screencapped, cropped the photo, uploaded it..
Now, the question is..
Does it help you understand more, or less? :v:[/QUOTE]
reminds me of aliens
[QUOTE=Bradyns;39709878]There, I downloaded the journal, screencapped, cropped the photo, uploaded it..
Now, the question is..
Does it help you understand more, or less? :v:[/QUOTE]
I think it's summing together the probability of the quantum states.
Edit: The people over at the Math thread probably knows more. I'm just basing it of the fact that it's a summation symbol, and the fact that p is an element of set P(which is a probability) :v:
Oh man, this is simply magnificent. The first step in a long journey of awesome science that is quantum theory.
I have absolutely no clue what this means but if it can make things better then I'm all for it
dirac notation grows on you after a while :v:
If anyones interested, what this basically means for us is that we'll get better stuff in potentially not so far future.
i'm not bad at math but holy shit do i not know what the fuck that equation means D:
[QUOTE=DrBreen;39710157]i'm not bad at math but holy shit do i not know what the fuck that equation means D:[/QUOTE]
Well the equation itself provides no explanation of its terms so that's not surprising
Okay this is a little off topic but bros, try middle clicking and dragging on the article in the OP
whoaaaa
On top: Can't wait for quantum computers
Still trying to wrap my mind around this, however from what I'm understanding, this seems to be a shortcut around the numerous theorums/equations for quantum mechanical systems.
Perhaps removing some of the uncertainties of some systems? Maybe not on the level of Heisenberg, but almost?
Don't understand this but looks interesting :v:
What the fuck am I looking at?
[QUOTE=danielmm8888;39711302]What the fuck am I looking at?[/QUOTE]
I think it's the work of the devil.
I don't understand a single thing about Maths but this just feels like I'm looking at Egyptian Hieroglyphics.
[QUOTE=LoneWolf_Recon;39710902]Still trying to wrap my mind around this, however from what I'm understanding, this seems to be a shortcut around the numerous theorums/equations for quantum mechanical systems.
Perhaps removing some of the uncertainties of some systems? Maybe not on the level of Heisenberg, but almost?[/QUOTE]
Not from what I understand. Basically, before, they found out the answer to the algorithm, simplified it, built a circuit around the simplified version and if the answer was the same, they called it a day. Now they can just build the circuit without knowing the answer in advance. Pretty damn useful if you consider it classically (its like knowing the answer to (3+2)-(1+6), but you don't know how to build a circuit around that, so you just simplify the original thing to 5-7 then build a circuit around that instead and check your answer with your original, un-simplified version.)
[QUOTE=Waterpi;39711503]Not from what I understand. Basically, before, they found out the answer to the algorithm, simplified it, built a circuit around the simplified version and if the answer was the same, they called it a day. Now they can just build the circuit without knowing the answer in advance. Pretty damn useful if you consider it classically (its like knowing the answer to (3+2)-(1+6), but you don't know how to build a circuit around that, so you just simplify the original thing to 5-7 then build a circuit around that instead and check your answer with your original, un-simplified version.)[/QUOTE]
So they've developed a working quantum mechanical circuit of a previously untested algorithm? What type of operation are we talking about? Something like a quantum gate?
[QUOTE=LoneWolf_Recon;39711566]So they've developed a working quantum mechanical circuit of a previously untested algorithm? What type of operation are we talking about? Something like a quantum gate?[/QUOTE]
I don't think it's a specific thing, like the Dirac equation or something. All I think they did here is find some algorithm that they can build a circuit around and find the answer, instead of finding the answer and building a circuit around that. I'm probably wrong somewhere with the technical bit, but the best I can get is this: Its using the quantum phase estimation algorithm twice (basically gets the eigenphase of a particle from a couple of things), firstly with respects to positions in space that are an element of the particles probable positions, second with the particles generalised coordinate being an element of the set of rational numbers. Further than this idk, I got a small grasp of the factors of the algorithm, but as far as I know the thing as a whole doesnt mean anything specific
Quantum Mechanics iz rly confuzing but i think science iz predy kewl!!!!1!!
someone put this in simple peanut terms please
[QUOTE=salty peanut v2;39712471]someone put this in simple peanut terms please[/QUOTE]
Stuff+stuff=stuff stuff
[QUOTE=salty peanut v2;39712471]someone put this in simple peanut terms please[/QUOTE]
Paves the way to much, much, much faster computing (instead of something taking 50 years to calculate, it takes milliseconds or less)
[QUOTE=Waterpi;39712156]I don't think it's a specific thing, like the Dirac equation or something. All I think they did here is find some algorithm that they can build a circuit around and find the answer, instead of finding the answer and building a circuit around that. I'm probably wrong somewhere with the technical bit, but the best I can get is this: Its using the quantum phase estimation algorithm twice (basically gets the eigenphase of a particle from a couple of things), firstly with respects to positions in space that are an element of the particles probable positions, second with the particles generalised coordinate being an element of the set of rational numbers. Further than this idk, I got a small grasp of the factors of the algorithm, but as far as I know the thing as a whole doesnt mean anything specific[/QUOTE]
So I assume that would help with relating to a Bloch sphere?
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