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Quantium Computers
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the other thing about quantum computers is that they will not be applicable to common programming tasks. Quantum computers are not FAST, per se. Instead, they are capable (with a lot of work) solving problems that a digital computer could NEVER solve, or only solve in 1.3 billion years. The supposed speed gain is not because it is running the same calculations as a digital computer at a much higher clock rate, the speed gain is from approaching the problem in a completely different manner.
Comparing quantum computers to digital computers would be like comparing digital computers to the human brain. They all do calculations, but they are all incapable of doing the SAME calculations as one another.
Comparing quantum computers to digital computers would be like comparing digital computers to the human brain. They all do calculations, but they are all incapable of doing the SAME calculations as one another.
I know that with quantium machines, all current encryption schemes are worthless, and that for quantium encryption, one of the constructs is that the key changes if it is viewed, so if the information is intercepted, it won''t be able to be read by the interceptor or the destination. Perhaps some of the basics, and other than that, zilch. It would be interesting to study though...
bastard2k5 is a Giant Dragon that leaves a Trail of Goo, Hovers Eerily, swallows Aeroplanes Whole, and eats Metal.
(Strength: 9 Agility: 9 Intelligence: 8)
Unleash your Giant Battle Monster.
bastard2k5 is a Giant Dragon that leaves a Trail of Goo, Hovers Eerily, swallows Aeroplanes Whole, and eats Metal.
(Strength: 9 Agility: 9 Intelligence: 8)
Unleash your Giant Battle Monster.
it''s "quantum" not "quantium". No "I".
Quantum computers will supposedly be able to crack certain encryption schemes rather quickly. Again, this is because it approaches the problem from a different angle, not because it can brute-force calculate faster.
As for the last part of your post, what you are mentioning is Quantum Encryption, which is not Quantum Computing. In fact, Quantum Encryption is possible today, Quantum Computing is not.
Quantum computers will supposedly be able to crack certain encryption schemes rather quickly. Again, this is because it approaches the problem from a different angle, not because it can brute-force calculate faster.
As for the last part of your post, what you are mentioning is Quantum Encryption, which is not Quantum Computing. In fact, Quantum Encryption is possible today, Quantum Computing is not.
Quantum Computing can use an indefinite amount of states, not just 32.
The upkeep is the difficult thing... error checking
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The upkeep is the difficult thing... error checking
---------------------------------------------------
laziness is the foundation of efficiency
retrospiral.net | llamas! | megatokyo | FreeBSD | gamedev.net | google
I thought quantum computers was about the next step in electronics:
Tube --> Transistor --> IC --> Quantup Chip
I thought it was about transistors as small as a molecule, allowing much more transistors on a smaller space and with less heat, so it'd be a much faster version of the current computers, but for the rest the same.
BUT if quantum computing is instead something that isn't faster than todays computing, only different...
can't it be emulated on a regular computer?
[edited by - boops on October 15, 2003 2:37:53 PM]
Tube --> Transistor --> IC --> Quantup Chip
I thought it was about transistors as small as a molecule, allowing much more transistors on a smaller space and with less heat, so it'd be a much faster version of the current computers, but for the rest the same.
BUT if quantum computing is instead something that isn't faster than todays computing, only different...
can't it be emulated on a regular computer?
[edited by - boops on October 15, 2003 2:37:53 PM]
Quantum Computing takes advantage of several rules of Quantum Mechanics. Since they rely on special physics, you can''t really emulate it in software. Well, you could, its just that you would be emulating stuff on a sub-atomic level with lots of high-level equations which would be extremely slow.
quote:
Original post by smiley4
So quantum is just another word for Pentium or Centrino? Sales people realy know how to have false advertisment!
no
"C lets you shoot yourself in the foot rather easily. C++ allows you to reuse the bullet!"
Ive got a quantum goldfish, and it isnt much different than a regular goldfish. It wasnt worth the extra $1300.00 cost. I have no reason to belive that quantum computers will be any more worthwhile.
A quantum computer isn''t some super fast computer. It is a computer that can do all possible outcomes of a problem at the same time, using the weird properties of quantum mechanics.
Instead of using bits(1''s and 0''s) it would use qubits, which can hold any real number between 0 and 1. In a sense a qubit can be 80% 1 and 20% 0, or any combination that adds to 100%. THe weird thing is that once you measure the qubit, it would fall entirely into 100% 1 or 100% 0. (So you can''t look at it)
I don''t know how they work exactly, but I know that it would be able to put a complex problem into a superposition, in a sense look at every possible answer at once, then pop the correct one out, instead of checking every single one in a sequence.
Instead of using bits(1''s and 0''s) it would use qubits, which can hold any real number between 0 and 1. In a sense a qubit can be 80% 1 and 20% 0, or any combination that adds to 100%. THe weird thing is that once you measure the qubit, it would fall entirely into 100% 1 or 100% 0. (So you can''t look at it)
I don''t know how they work exactly, but I know that it would be able to put a complex problem into a superposition, in a sense look at every possible answer at once, then pop the correct one out, instead of checking every single one in a sequence.
dont know how all this quantumcomp stuff will end, but today they can only compute the primes up to 5, thats all, and a quantum computer doesnt need to be fast, you will be able to connect zillions of them in only one chip and that will boost the computing power... think of the brain, its working at 0.01Hz or less, but its capable to compute stuff that today''s computers need much more gigaHz and time for the same task
once they can build some simple structures and connect them, woooom...
T2k
once they can build some simple structures and connect them, woooom...
T2k
*edit: deleted my first paragraph, which is repeated later anyhow
Consider a single bit. Before you look at it, it can be either a 0 or a 1, with equal probability. Once you look at it, it becomes a 0 with 100% probability, and a 1 with 0% probability. Digital computers have no choice but to look at the bit. A quantum computer would manipulate the bit without looking at it. Some algorithm would manipulate the bit so that the probability of it being a 0 is increased while the probability of it being a 1 is decreased. Then, you look at it to get your answer.
That's the biggest problem with emulating it digitally: storing those probabilities. An 8 bit integer can be any of 16k values. A digital computer would need to store a probability for all 16k possible values [with a fair amount of precicion], while a quantum computer would only need to store the single 8 bit integer.
So the hurdle is finding algorithms that manipulate those probabilities in such a way as to force the output to its desired value. There's already an algorithm that factors numbers easily this way, and that's why its so valuble to security people. A 128 bit key is damn near impossible to factor digitally, but a breaze quantumly. But there's also an algorithm for finding elements in an unsorted database in better-than-linear time. So there are already practicle uses for quantum computers around.
CM
[edited by - Conner McCloud on October 15, 2003 3:09:24 PM]
Consider a single bit. Before you look at it, it can be either a 0 or a 1, with equal probability. Once you look at it, it becomes a 0 with 100% probability, and a 1 with 0% probability. Digital computers have no choice but to look at the bit. A quantum computer would manipulate the bit without looking at it. Some algorithm would manipulate the bit so that the probability of it being a 0 is increased while the probability of it being a 1 is decreased. Then, you look at it to get your answer.
That's the biggest problem with emulating it digitally: storing those probabilities. An 8 bit integer can be any of 16k values. A digital computer would need to store a probability for all 16k possible values [with a fair amount of precicion], while a quantum computer would only need to store the single 8 bit integer.
So the hurdle is finding algorithms that manipulate those probabilities in such a way as to force the output to its desired value. There's already an algorithm that factors numbers easily this way, and that's why its so valuble to security people. A 128 bit key is damn near impossible to factor digitally, but a breaze quantumly. But there's also an algorithm for finding elements in an unsorted database in better-than-linear time. So there are already practicle uses for quantum computers around.
CM
[edited by - Conner McCloud on October 15, 2003 3:09:24 PM]
I read an article in a Scientific American about Quantum Computer Error Correction, and how the problem has been solved using a very neat trick with ''entangled'' qubits.
In some of Robert J. Sawyer''s books (Hominids and Humans), the quantum computers use other quantum computers in parallel dimensions to work out calculations to speed it up indefinately.
Rob Loach
Current Project: Go Through Object-Oriented Programming in C++ by Robert Lafore
"The question is not how far, the question is do you possess the constitution, the depth of faith, to go as far as is needed?"
- The Boondock Saints
Rob Loach
Current Project: Go Through Object-Oriented Programming in C++ by Robert Lafore
"The question is not how far, the question is do you possess the constitution, the depth of faith, to go as far as is needed?"
- The Boondock Saints
quote:
Original post by Rob Loach
In some of Robert J. Sawyer''s books (Hominids and Humans), the quantum computers use other quantum computers in parallel dimensions to work out calculations to speed it up indefinately.
Rob Loach
Current Project: Go Through Object-Oriented Programming in C++ by Robert Lafore
"The question is not how far, the question is do you possess the constitution, the depth of faith, to go as far as is needed?"
- The Boondock Saints
uh....
what the hell does that mean?
how you would you get a quantum computer in another dimension in the first place?
quote:
uh....
what the hell does that mean?
how you would you get a quantum computer in another dimension in the first place?
that means by finding a way to communicate with a different dimension and finding a dimension where time is running faster than in our dimension you could use it to increase your computation powers (you could recursively build this construction, because an infinite ammount of dimensions should exist and there should always exist a dimension where time runs faster)... but the problem is to teleport a workable quantumcomputer into this dimension and dont loose it
p.s.: read Michael Crichton''s Timeline, they use a quantum computer in another dimension to, ehm read it ;D
T2k
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