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First 'Quantum Computer Chips' Demonstrated
holy_calamity writes "The first quantum computer chips have been made by two US groups, New Scientist reports. Both NIST and Yale have demonstrated chips where information was transferred between two superconducting qubits using a 'quantum bus'. The bus is made from a cavity that traps a single microwave photon as a standing wave — the NIST group also managed to use the bus to store data from one qubit for a short time. 'After encoding information in one qubit, they transferred it into the cavity for 10 nanoseconds before transferring it to the other qubit. Yale's chip used qubits around 1-micron square built on silicon, while NIST used larger 10-square-micron qubits on top of sapphire. In both prototypes, the bus between the qubits was between five and seven millimeters long.'"
maybe I'm first, maybe I'm not.
Is it just me, or do you hate it when people say "Is it just me..."?
Must...Not...Imagine....Beowulf...Cluster....
Gifts for Geeks - Stuff that really matters!
Howdy. I don't claim to understand all of this. However, the more I read, the more I am convinced the universe makes no sense. I am waiting for the guy who is dreaming all of this to wake up and for all of us to stop existing.
See my journal for slashdot ID's by year. Mine created in 2005. http://slashdot.org/journal/289875/slashdot-ids-by-year
nyah, nyah, nyah.
Personally, I'm holding out for the first Quantum Whizzer.
Don't let your cat get inside it!
He may or may not survive it.
Knowledge is power. Knowledge shared is power lost.
I was going to tell you, but I changed the outcome by reading it!
Well, back to rejecting software patent applications.
... but will it run Linux? (Or will it run and not run Linux at the same time?)
You can't know how many cats wide it is or fast it is until you transfer data over it.
This has got to be an awesome project to work on...I'm jealous.
Yeah? Well I think you're overrated too.
that stuff like this is the "glue" behind the universe, and someday, some scientist in a lab is going to have an experiment go horribly wrong?
.. know anybody in Hollywood?
Every time you ________ in Soviet Russia, kitten kills God!
Once quantum computers become mainstream, what will we use for encryption? Are there algorithms that are computable by standard computers but are also unbreakable using quantum computers?
-Bucky
"What's a cubit?"
That is the number of cats that will fit in my trash compactor before it won't compact anymore.
A bus on a quantum computer is like jet engines on a cloth-covered wooden airplane.
Why not use quantum entanglement ("spooky action at a distance") instead of an old fashioned bus.
Surely you should be researching having instantaneous data transfer across the chip using quantum entanglement? No bus required...
Intel Core 2 Duo die size is 143mm^2, so that's 143 million devices. That is somewhere between Barton and the K-8 (also above the Itanium, but nowhere near the I2). Ref: http://en.wikipedia.org/wiki/Transistor_count If you truely can do parallel processing then I suppose it could replace Si.
Actually, that totally makes sense. you can transfer bits of data through the void instantaneously. But then, what we really need is a computer that gives you the answer to any question just by observing it.
"In both prototypes, the bus between the qubits was between five and seven millimeters long"
So that would be six mm then? Or is the length of the bus a matter of quantum uncertainty?
This doesn't make sense to me cuz I'm not a quantum physicist. If the qubits are in two states at the same time, how do you determine that the data was transfered and stored on the second qubit like that said? Wouldn't it always appear the same because it's always in both states at once?
Google's Super Secret Search Algorithm: SELECT @search_results FROM internet WHERE @search_results = 'good'
change the outcome of the story?
Let me be the first to say:
WOOT! Now we can finally run Vista.
As I recall this is not the first quantum computer chip. Didn't a company called D-Wave Systems of British Columbia demonstrate a 16-qubit quantum computer a while back? It's the first quantum bus maybe... But surely not the first chip.
Readers may find the Yale group's press release interesting.
In other news, the NSA is partnering with NIST and University of Maryland to form the Joint Quantum Institute.
Slashdot's first reaction to VMware
The one time pad, where the key length = message length is still safe as long as you never reuse the key. (the "one time" in one time pad.
As simple proof of this is that for any encrypted text of length N, there exists a key also of length N that will decrypt the etext to any plain text of length N. Therefore there is no way for an attacker to determine if an attempted key is valid or not. There if an attacker were to try every single key of length N, which is possible on some super large future quantum computer, all he will get out is every single decryption of length N, with no way to determine which is correct.
Suppose the plain text was "attack at dawn" and the etext was "xbdhgfhwteriur". After the attacker used his q-computer he'd have "attack at dawn", "attach at noon" and "attack at fred", along with 64 quintillion other combinations.
All ideas^H^H^H^H^Hprocesses in this post are Patent Pending. (as well as the process of patenting all postings)
Does it runs Halo 3?
Forget what I said in my , I misread your post. But for RSA and other public key algorithms, the speedup is exponential, so they're effectively defeated by QC. Grover's algorithm is just a quadratic speedup, so it can be defeated by doubling the key size.
The AACS key is NOT 0xF606EEFD628B1CA427BEA93A9CA9773F
If there are no current real world applications that are programmed for or depend on quantum computers, the proper response is "so what?"
I do not care about quantum computing.
There are perhaps a bunch of nerds in the basement of buildings in Virginia that may.
There may also be a few people in skyscrapers in Manhatten that may.
But for hundreds of millions, perhaps pushing a billion of other computer users around the world this is meaningless noise.
...it was transferred to Q*bert and he jumped on one of those purple snakes.
What's wrong about being the first sentient subquark haze?
Patents Drive Free Software as Hurricanes Drive Construction Industry
As long as this computer is in an enclosed case it doesn't exist, happily, if you've got one of those cases with a plexi-glass side, it DOES exist.
[/war] "All the world's a stage, And all the men and women merely players."
...can it factor the number 16 yet?
Does this remind anyone else of the short fiction story I don't know, Timmy, Being God is a Big Responsibility?
Get a web developer
In the case of my workstation in a college lab, it's next to the radioactive waste.
...From immuno-assays. It was so low-level it barely registered on the Geiger counter. But it was in a 55gal drum.
True story
"Cheeze it!" - Bender
A site that explains quantum entanglement in terms even your grandparents could (almost) understand:
http://www.davidjarvis.ca/entanglement/
Using novel schemes, such as decoy states (very weak pulses that would let you spot any eavesdropper. Roughly), QKD has been demonstrated over 10km in commercial fibers.
That would work great for the government or other large organizations, but how could ordinary users protect, for instance, their online banking transactions once quantum computing becomes mainstream? How could you, for instance, access your banking information over routed networks (since QKD relies on a single unbroken fiber for photons to travel down in order to maintain coherance)
-Bucky