Topic: D-Wave a company that claims to manufacture Quantum computers. (Read 2773 times)

Quantum computing is real. That I do know.

Isn't it ideal "in principle" for things like breaking encryption?

D-wave isn't Google owned, though Google has bought one of their products before.

D-wave's devices are not, and are not claimed to b,e "quantum computers" in the sense of the term that computer scientists normally use the term. They cannot be used for many of the applications that in theory quantum computers could be used for such as faster attacks on some common cryptosystems, nor does anyone from d-wave say they can. Nor can they apply Grover's algorithm to get the generic quadratic speedup. They are not quantum turing complete, nor does anyone from d-wave say they are. Their design doesn't appear to be obviously extendable to make it quantum turing complete, either.

What they to is perform a very narrow kind of optimization process. For a long time there was a lot of controversy if their device made any use of any quantum process at all or if it was just a kind of classical analog computer, though they finally published papers showing that they probably do. Even with that it not clear if dwave actually solves the narrow optimization problem its intended to solve faster than state of the art techniques on a boring classical computer (especially not a classical computer with equal costs).

In any case, the long and the short of it is that it's not of any relevance here. Don't let yourself get duped by marketing.

We should not be talking about nextgen quantum computing too seriously before we even know if the first generation is real. 

Also quantum computing is really not applicable to SHA-256.

Let's not get d-wave and "quantum computing" mixed up. Nextgen quantum computers will perform specific calculations at speeds unknown to to the fastest of today's supercomputers.

This has been covered many times here.  So far it does not do anything faster for the same money as conventional computing.  And at worst it is not even what they say it is. 

http://www.insidescience.org/content/d-wave-computers-solution-raises-more-questions/1453

http://www.dwavesys.com/en/products-services.html

I'm not sure about their claim to having quantum computers, whats the technology they use? seems like just semi-conductors.

Google says/claims it has speeds 3600 times faster than a normal computer, seems as though google has just purchased from a company

that is  a copy of Bitcoin Asics. Also the theory of Quantum computers having dual position seems stupid, obviously it is

switching positions or its not actually doing anything ?

and ?

laser processor is always more fast than electrical processor ... and more easy to build.
so why quantum processor can exist ?

because it's a useless technology for many.

The BS meter seems to go into quantum overdrive in this link 

http://whatis.techtarget.com/definition/qubit

Superposition
Think of a qubit as an electron in a magnetic field. The electron's spin may be either in alignment with the field, which is known as a spin-up state, or opposite to the field, which is known as a spin-down state. Changing the electron's spin from one state to another is achieved by using a pulse of energy, such as from a laser - let's say that we use 1 unit of laser energy. But what if we only use half a unit of laser energy and completely isolate the particle from all external influences? According to quantum law, the particle then enters a superposition of states, in which it behaves as if it were in both states simultaneously. Each qubit utilized could take a superposition of both 0 and 1. Thus, the number of computations that a quantum computer could undertake is 2^n, where n is the number of qubits used. A quantum computer comprised of 500 qubits would have a potential to do 2^500 calculations in a single step. This is an awesome number - 2^500 is infinitely more atoms than there are in the known universe (this is true parallel processing - classical computers today, even so called parallel processors, still only truly do one thing at a time: there are just two or more of them doing it). But how will these particles interact with each other? They would do so via quantum entanglement.

What's with everyone in this thread bashing on D-Wave?  If it was really bullshit companies wouldn't be buying D-Wave's units.  Quantum computing is simply in it's very early stages, and it's benefits are going to be really limited to niche problems where regular processors do a really bad job.

And there's nothing BS about quantum physics, why would you doubt quantum superposition?  That's plain ignorant.

What's with everyone in this thread bashing on D-Wave?  If it was really bullshit companies wouldn't be buying D-Wave's units.  Quantum computing is simply in it's very early stages, and it's benefits are going to be really limited to niche problems where regular processors do a really bad job.

And there's nothing BS about quantum physics, why would you doubt quantum superposition?  That's plain ignorant.

Perhaps they learned some tricks Butterfly Labs?  I wonder if Google bought a pre-order or the real thing?  I wonder if the machines will work at least a little bit once the fan is flipped around?

they do seem to making some kind of Quantum computing claim which seems to be fictional in every way shape and form