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Re: Quantum Computing ? 

By: Decomposed in POPE IV | Recommend this post (1)
Sun, 10 Jan 16 10:12 PM | 79 view(s)
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Msg. 02290 of 47202
(This msg. is a reply to 02286 by Zimbler0)

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re: "Would that be an accurate assessment of what a 'quantum computer' can do for us? Unreliable 'probabilistic' answers?"

Maybe, but that's not how I've heard it described.

What I've heard is that a quantum computer can work multiple possibilities simultaneously - allowing it to do calculations for x=0, x=1, AND every value in-between, almost as quickly as a conventional computer can do the calculation for x=0 and x=1.

It sounds impossible, but it's the reason why quantum computers will make cryptography obsolete. All possible passwords can be attempted, permitting very rapid brute-force deciphering of messages regardless of password length or complexity.

Scubavol is right that it's not known if interaction with multiple universes are the reason for quantum behavior. It's all very weird. The best I can say is that the multiple universe explanation isn't inconsistent with quantum behavior. Maybe there's a better explanation . . . but I don't know it.
 





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The above is a reply to the following message:
Quantum Computing ?
By: Zimbler0
in POPE IV
Sun, 10 Jan 16 8:57 PM
Msg. 02286 of 47202

Scubavol> "From someone who once stated that quantum computers exist and accepted the conventional wisdom as to Schrodinger's cat until I called BS on both"

Decomposed> *ahem* I still say that quantum computers exist.
Ever since D-Wave arrived on the scene with a type of quantum computer capable of performing a problem-solving process called annealing,


Zim: Do 'quantum computers' give repetitive results?
Can the quantum computers be benchmarked against our
existing 'classical computers'?

I found this :
>>>
These rules that govern the quantum world are so different from those of the macro world that our traditional understanding of binary logic in a computer doesn’t really work effectively any more. Quantum laws are based on probabilities, so a computer on this scale no longer works in a ‘deterministic’ manner, which means it gives us a definite answer. Rather, it starts to behave in a ‘probablistic’ way—the answer the computer would give us is based on probabilities, each result could fluctuate and we would have to try several times to get a reliable answer.

http://www.nova.org.au/technology-future/quantum-computing
>>

Would that be an accurate assessment of what a 'quantum computer'
can do for us? Unreliable 'probabilistic' answers?

Zim.


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