Michael Nielsen's Free Video Courseware On Quantum Computing

I don't know if you are serious or joking here, but you could definitely stand to take this course. You seem to be under a lot of misconceptions about what quantum computing can do.

Quantum, or more specifically quantum mechanics will be the next Major human revolution.

Quantum mechanics is used all the time by lots of devices you use. Small transistors work because of quantum mechanics. Lasers work off of lots of quantum mechanics. LEDs work off of quantum mechanics. Etc. Etc. There's nothing new about using quantum mechanics.

and Quantum Transceivers to that all those Optical SFPs in your switches and routers won't need cables anymore

This and almost every other application you mention is complete nonsense. Quantum mechanics does not allow you to transmit information in special ways. Entanglement doesn't let you get away with that. (This is as far as we are aware, ignoring for now certain very interesting results from CERN that are likely to be incorrect and are still being checked over. Even if this is correct, it is unlikely to allow actual FTL or the like but rather be other interesting new physics. And calling that simply quantum mechanics would be misleading.)

You can do things with quantum computers that you can't do with conventional systems. What we mean by quantum computers are not computers that use quantum mechanics in general (since they all do that) but computers that can take advantage of entanglement. This allows certain processes to occur much faster than they can with a conventional computer. For example, operations with Fourier series become a lot easier, and it becomes much easier to find the period of a given function. This translates into being able to do certain classes of problems much faster.

For example, it seems that using something called Shore's algorithm ahref=http://en.wikipedia.org/wiki/Shor's_algorithmrel=url2html-18175 [slashdot.org]http://en.wikipedia.org/wiki/Shor's_algorithm> you can factor integers faster on a quantum computer than you can on a classical computer. This is a big deal, but even this requires a lot of caveats. First, we can't actually prove that this is better than the best classical factoring algorithms. In most interesting formulations of this claim, it depends on the assumption that factoring is not in P, a claim that is strictly stronger than the claim that P != NP http://en.wikipedia.org/wiki/P_versus_NP_problem [wikipedia.org] (it is possible that factoring lies in P but one gets a large speedup of like Klogn or something like that to the quantum system. This is possible, but fundamentally less interesting and less useful.)

There are other specific similar examples, and even a handful where we can prove that the quantum version is really better than any classical version. The most prominent such example is Grover's algorithm. http://en.wikipedia.org/wiki/Grover's_algorithm [wikipedia.org]. This algorithm allows you to search unsorted databases much faster than you can in a conventional setting. That's a really useful but ultimately high restrictive use.

Now, in fairness to you there are some uses of entanglement and other interesting quantum phenomena which don't rely on quantum computing per se. So you may have been thinking of those. But those don't allow what you seem to think they can do either! The closest to anything like that is quantum encryption, which makes a system of encryption that is essentially unbreakable as long as our understanding of the laws of physics are correct. That's pretty cool but even that has its own limitations, and it turns out can in some specific circumstances be broken http://www.sciencedaily.com/releases/2008/05/080508143107.htm [sciencedaily.com]. There are other interesting technologies out there like so-called "quantum dots" that are turning out to be quite useful. But they aren't much more quantumy than lots of other stuff.

So no, quantum mechanics isn't going to change everything except in so far as it already is used in all sorts of technologies you use in a daily basis. And it isn't going to allow instantaneous communication without any form of physical connection or anything like that. That's too bad, because everything you mention would be awesome. But nature doesn't work off of what is awesome so engineers and physicists need to build awesome things that actually fit the laws of physics.

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/q0a3Mzt0QSI/Michael-Nielsens-Free-Video-Courseware-On-Quantum-Computing

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