Go homepage(回首页)
Upload pictures (上传图片)
Write articles (发文字帖)

The author:(作者)qq
published in(发表于) 2014/6/20 7:52:24
Quantum computers faster than the home PC？ ，

Quantum computers faster than the home PC?
-Quantum computer-IT news Quantum computers faster than the home PC?

Quantum computer D-Wave 2 recently was hubbub, but now scientists report that, D-Wave 2 and no faster than traditional old computer. And so on! A few months ago did not say 3,600 times times faster than conventional computers? Yes, in fact, two scenarios without error, since two computers that you want to compare a little faster is a complex issue.

Quantum computer, in theory, is faster than ordinary computers. This is mainly due to his use of quantum mechanics. Traditional computer per bit 0 or 1, but a quantum computer "quantum bits" you can simultaneously be 0, 1, 2 or overlapping State, this is the reason that quantum computers can be accomplished faster calculations.

Currently D-Wave 2 is the second of market sales of quantum computers, the so-called "market-oriented sales" means if you have a $ 15 million cash, you can buy a home and play. Lockheed Martin de? Martin bought one, at the University of Southern California, recently conducted experiments were performed on this computer. In addition, Google also bought a D-Wave 2.

Why speed on D-Wave 2 has several different versions? In fact, this depends on how you tested it. Before, we said D-Wave 2 3,600 times times faster than ordinary computers means it is in solving a particular problem (specially designed for the quantum computer)

# #@Dalin:CPLEX optimization algorithm of computing speed. Make a rough analogy, such a comparison is like comparing a hammer and screwdriver, nail which is more powerful.

According to the latest study, published in Science, scientists in order to make the game fairer, they run on the traditional PC D-Wave 2 and "matching algorithm", to compare the speed difference between the two. Results scientists have found "no evidence that quantum computers faster."

However, this does not mean that the development of quantum computers into a dead end, the New Scientist, presented in a timely manner, why such a test may be underestimating the strength of D-Wave 2:

D-Wave way to solve the problem, we can understand: in a hilly area, we want to identify the lowest as the best answer. For the average computer, it must climb a small hill, go low. But for a quantum computer, it does not need to hike up the mountain, it can be passed through a tunnel through a mountain.

A flaw many questions used for testing is the lack of challenge. This lead to D-Wave cannot be the play to advantages of quantum mechanics ... Not that quantum computers does not perform well, but the issue failed to make quantum computers that are used to play advantage.

This sounds really awkward: we create a new computer, but I don't know even how to test it.

赞