do you believe in quantum computing ?
category: general [glöplog]
I don't. Even if it exists. I don't think you can make a general purpose quantum processor.
some company already sells a quantum computer with a few bits
of "processing power" or how it is called in that context.
it's either a german or austrian company... can't remember now.
read about it in c't, a quite popular german computer-mag.
of "processing power" or how it is called in that context.
it's either a german or austrian company... can't remember now.
read about it in c't, a quite popular german computer-mag.
Where did you hear about it?
There's a Canadian company called D-Wave who released a 16 qbits solid state quantum computer a few months ago, but it's not universal anyway. Apart from that there's Id Quantique in Switzerland and MagiQ in... US I think who are selling (almost) secure quantum cryptography systems.
There's a Canadian company called D-Wave who released a 16 qbits solid state quantum computer a few months ago, but it's not universal anyway. Apart from that there's Id Quantique in Switzerland and MagiQ in... US I think who are selling (almost) secure quantum cryptography systems.
Maybe they are selling fake quantum computers.
I know of random number generators made by Id Quantique.. But real computers??? Not anytime soon, i guess?!
in this http://www.heise.de/ct/ papermag.
i mean the same as you do. i've completely mixed it up.
and yeah, it's not universal, but i thought i'd post it anyway.
i mean the same as you do. i've completely mixed it up.
and yeah, it's not universal, but i thought i'd post it anyway.
what's there to believe in, really? working quantum computers (if only very simple ones) have been around for some time now. the rest is a matter of time.
general purpose quantum processor: well, any quantum computation (with the models i know anyway) is necessarily invertible, which sure is a nice property for (cracking) cryptography or combinatorial optimization, but just as surely doesn't sound like a very useful property for general purpose computation (being able to throw information away sure saves on memory requirements :). i'm by no means an expert on the matter, but quantum computers seem pretty much dual to "regular" machine models (e.g. RAMs) in the sense that QCs can solve some problems a lot more efficiently than regular machines can, but would require extreme amounts of storage and computational capacity (boils down to the same thing in this particular case) to simulate a RAM. so it's not really a question of whether they'll replace current machines - if they ever get mainstream (and that still requires a bunch of really hard problems to be solved), i think it'll be in the form of add-on hardware for specialized problem solving (think dsp boards or GPUs here), not as a replacement for a normal cpu. (let's ignore for a moment that nobody really knows what a "normal" cpu will be in 10 years or so, and given the current state of affairs in quantum computing, 10 years to mainstream sounds extremely optimistic)
general purpose quantum processor: well, any quantum computation (with the models i know anyway) is necessarily invertible, which sure is a nice property for (cracking) cryptography or combinatorial optimization, but just as surely doesn't sound like a very useful property for general purpose computation (being able to throw information away sure saves on memory requirements :). i'm by no means an expert on the matter, but quantum computers seem pretty much dual to "regular" machine models (e.g. RAMs) in the sense that QCs can solve some problems a lot more efficiently than regular machines can, but would require extreme amounts of storage and computational capacity (boils down to the same thing in this particular case) to simulate a RAM. so it's not really a question of whether they'll replace current machines - if they ever get mainstream (and that still requires a bunch of really hard problems to be solved), i think it'll be in the form of add-on hardware for specialized problem solving (think dsp boards or GPUs here), not as a replacement for a normal cpu. (let's ignore for a moment that nobody really knows what a "normal" cpu will be in 10 years or so, and given the current state of affairs in quantum computing, 10 years to mainstream sounds extremely optimistic)
heh the D-Wave Orion system looks and sounds very demo-ish :D
except for some niche applications i guess conventional deterministic computing will remain dominant for a very long time. it took about 50 years for parallel computing to become common place, and it will take at least the same amount of time for quantum computing.
i don't even know a demo that uses multicore :S
well, as long as you're mainly pushing polys, there is near zero gain in multicore because gl/d3d interfaces are singlethreaded. and simulation/computation-heavy stuff is kinda tricky because you usually need a certain level of horsepower for it to run with proper speed at all. if you only get it fast enough using multiple cores, you just need them, and since there is that very vocal minority of morons who start huge flamefests whenever a 2007 demo doesn't run on their 2001 hardware, i can well understand that nobody wants to be the first to require it.
That looks expensive. I want one.
i don't believe in this newskool shite. (hey this feels elite)
Awesome radiator !
the D-wave stuff is *not* a quantum computer in the universally accepted meaning of the words "quantum computer".
And I'm with ryg on that part that if we manage to build working quantum computers, they will be probably pluggable into usual computers and designed to solve specific problems, at least for a while.
And I'm with ryg on that part that if we manage to build working quantum computers, they will be probably pluggable into usual computers and designed to solve specific problems, at least for a while.
