No Lame Ass old April Fool's Joke Here...

UnripeArbiter

UnripeArbiter

Extreme Skeptic.
Dec 21, 2006
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The Vortex.™
Remember CADIE? Ha.

Get this.....

Google has now demonstrated machine learning using QUANTUM ALGORITHMS.

Google has created a detector using a multi-qubit chip, built by D-Wave, and quantum algorithms that has learned to spot cars by looking at example pictures.

Google Research Blog Article.

I missed this article below out of New Scientist from Feb of 09'....(may have been posted)

Most powerful ever quantum chip undergoing tests

"QUANTUM computing for the masses could come a step closer if tests prove successful on a prototype chip designed to process more quantum data than any previous device."

Well, tests so far are proving successful apparently with this latest team up between D-Wave and Google.

However.....

"Unfortunately, it is not easy to demonstrate that a multi-qubit system such as the D-Wave indeed exhibits the desired quantum behavior and experimental physicists from various institutions are still in the process of characterizing the chip," Hartmut Neven, Google Technical Lead Manager Image Recognition, advised."

Barring further analysis.......

orianchip2.jpg


This ^ is the future staring at us in the face.....

(actually that picture was taken from 07' and is called the Orion it consists of 16 qubits.....the one Google used had 128....) Here's a picture of the one with 128 qubits called the Rainier.

Holy fuck, I hope this turns out to be the real deal.

It could turn out to be a major flop, though. No one's sure yet.
 


Bad title.... (bump, or is there something else I don't know?)

I thought this was amazing, I didn't even know that quantum computing had made it out of the lab.

Fascinating, to me at least.
 
it's adiabatic quantum computation, somewhat different than a universal quantum computer that you're thinking of. there are other methods of quantum computing that may prove to be a lot better, but this is a good first step.

http://arxiv.org/pdf/quant-ph/0403090

look it's the bloch sphere:

237px-Bloch_sphere.svg.png


basic visual representation of a qubit, the |0> and |1> ket states, with superpositions |ψ> existing on the sphere in between.

adiabatic is just one method out of like 20 that are being explored though. this is why it could be a problem, and wikipedia has it probably as the easiest explanation:

"In practice, there are problems during a computation. As the Hamiltonian is gradually changed, the interesting parts (quantum behaviour as opposed to classical) occur when multiple qubits are close to a tipping point. It is exactly at this point when the ground state (one set of qubit orientations) gets arbitrarily close to a first energy state (a different arrangement of orientations). Adding a slight amount of energy (from the external bath, or as a result of slowly changing the Hamiltonian) could take the system out of the ground state, and ruin the calculation. Trying to perform the calculation more quickly increases the external energy; scaling the number of qubits makes the energy gap at the tipping points smaller."

I really can't think of an easier way to explain that though
 
DTAlexONE said:
What would this be applicable in?
Click to expand...

quantum computing in its ideal form gets past limitations of transistor size, even if we go to nanowires. it also introduces more states than just normal binary that a processor understands. binary in its raw form:

0 = OFF
1 = ON

for switches and transistors.

quantum states:

|00> = |0> zero ket state
|01>
|10>
|11> = |1> = 1 ket state
 
papajohn56 said:
"In practice, there are problems during a computation. As the Hamiltonian is gradually changed, the interesting parts (quantum behaviour as opposed to classical) occur when multiple qubits are close to a tipping point. It is exactly at this point when the ground state (one set of qubit orientations) gets arbitrarily close to a first energy state (a different arrangement of orientations). Adding a slight amount of energy (from the external bath, or as a result of slowly changing the Hamiltonian) could take the system out of the ground state, and ruin the calculation. Trying to perform the calculation more quickly increases the external energy; scaling the number of qubits makes the energy gap at the tipping points smaller."

I really can't think of an easier way to explain that though
Click to expand...

Very interesting, indeed.

Basically, now tell me if this is wrong, the problem is (with this particular quantum implementation)...

As we want these adiabatic quantum chips to go faster and faster the more and more heat is generated which reduces the gap between the Hamiltonian (which in this case represents the ground state or problem solution) and the point where decoherence occurs.

Was that retarded what I just said?
 
UnripeArbiter said:
Maybe that was retarded.

The faster we want these things to go the harder it is for them to remain stable. Lol, basically right?
Click to expand...

not necessarily, and not to sounds like I'm being a dick, but do you know what a hamiltonian is? the gap is an energy gap. decoherence can be "put off" with different methods for this, and just improving the adiabatic process.

H=T+V it really doesn't mean much until it's applied, where T is kinetic energy, V is potential energy in its most basic form. more advanced:

cf902ef6b1110a786c96f29dec8b9a65.png


for non relativistic systems
 
papajohn56 said:
not necessarily, and not to sounds like I'm being a dick, but do you know what a hamiltonian is? the gap is an energy gap. decoherence can be "put off" with different methods for this, and just improving the adiabatic process.

H=T+V it really doesn't mean much until it's applied, where T is kinetic energy, V is potential energy in its most basic form. more advanced:

cf902ef6b1110a786c96f29dec8b9a65.png


for non relativistic systems
Click to expand...

No, you don't sound like a dick to me, I was already concerned about sounding completely retarded.

I did attempt to find out what a Hamiltonian is before I made that comment.

As I understand the Hamiltonian (like retard wiki-only level) is that it represents the total energy of the system (at the time it's measured).

In an adiabatic circuit I think (again wiki-only) there are two Hamiltonians (this is where I may have fucked up before)

One Hamiltonian (the "complex" one) is the problem solution (the problem's solution). This Hamiltonian (whatever energy level it's at) is already at a stable state and must be maintained (if this were to decohere calculation would be impossible). This is the Hamiltonian that the second one will use to "evolve" into.

The second Hamiltonian (the "simple" one) is then let adiabetically evolve (after it's been set) until it reaches ground state which is the problem solution.

Now, I probably sound even more retarded than before. ::cringes::

UnripeArbiter said:
As we want these adiabatic quantum chips to go faster and faster the more and more heat is generated which reduces the gap between the Hamiltonian (which in this case represents the ground state or problem solution) and the point where decoherence occurs.
Click to expand...

I meant the gap between the two Hamiltonians, sorry, and when more heat enters the system that gap is harder to maintain.... I think they are keeping the "complex" H at extremely cold temperatures to keep it stable. The more heat that enters the harder it is to keep those temps. (I may be wrong, though.)
 
Jizzlobber said:
Is the gap an energy gap or an entropy gap?
Click to expand...

As far as this particular quantum computer chip is set up (adiabatic) the gap I'm referring two is in between two Hamiltonians ("energies or just H").

One H or energy "evolves" into the other H or energy (let's call this H on the right the problem's solution).

As the H on the left evolves into the H on the right its "computing".

It's hard to maintain these H's (energies) as the temp increases....

Again, I could be completely off and retarded here (and super simplistic)...
 
UnripeArbiter said:
As far as this particular quantum computer chip is set up (adiabatic) the gap I'm referring two is in between two Hamiltonians ("energies or just H").

One H or energy "evolves" into the other H or energy (let's call this H on the right the problem's solution).

As the H on the left evolves into the H on the right its "computing".

It's hard to maintain these H's (energies) as the temp increases....

Again, I could be completely off and retarded here (and super simplistic)...
Click to expand...

gap between energy levels. Things in the quantum world are discrete, so on energy level basis it's n=1,2,3...n-1 etc.


I'll be honest, this kind of thing really is something that isn't going to be explained well over an internet forum, or without the proper background
 
I'm just curious how long it will take before stuff like this is released to the general public.


The big thing with quantum computing is how insanely fast it cracks passwords.........One article I read said that a decent (atleast what a mediocre quantum computer would be considered in the future) could break a 128 bit encryption key in well under a second.

It would make all types of passwords/encryption codes almost worthless, even military stuff would be broken quite quickly.

In the back of my mind is always the concern that google will get a system together that will be able to really filter out spam and the like and really hurt AM and emailers............IMO current technology can't do it , but a quantum system could do it.
 
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