What to expect from quantum computers

Increasingly, in pseudo-scientific and scientific circles, they talk about quantum computers as one of the most promising developments on the planet. Is this so and is it worth to be afraid of the upcoming changes

The phrase "quantum computer" (QC) is perceived by many as a formulaic phrase from a science fiction film about the future. But in fact, the emergence of such computers is more real than it might seem. Moreover, this may happen in the next 5-10 years. It is expected that QCs will be able to solve problems that previously seemed simply insoluble or would take decades to solve.

As you know, in ordinary computers for storing information, a binary number system (1 and 0) is used. In a quantum computer, a physical phenomenon is used when certain microparticles can actually exist simultaneously in several places. Instead of the usual bits in QC, qubits are used, which can be 1 and 0 both separately and simultaneously. Thus, two "classical" bits encode information in only four possible combinations: 11, 10, 01, 00. A quantum computer can receive these combinations simultaneously. This can be clearly explained by the following example. Suppose you want to know which route between ten cities will be the fastest and cheapest. A typical computer would need to separately measure each distance, each cost, and then compare them all. Quantum technology, on the other hand, allows ten routes to be calculated simultaneously.

What can quantum computers be used for? Sounds strange, but at the moment about 1% of the possible applications of this technology are known. The point is, QCs can change literally every industry and every aspect of our lives. This is not about faster numerical calculations - existing computers do it just fine, but about more complex and unusual things. CC resembles our brain in its work. For example, he is able to distinguish between images and select the necessary ones from them. This will allow, for example, to analyze huge volumes of photo and video materials in search of the necessary information. Such a computer will be able to perform not only those tasks that computers are best at, but also those that humans are better at than computers.

As you know, learning is human. So, a quantum computer will be able to adopt this unique ability. For example, if a program makes the same error several times, the computer will find this error and make corrections to the code.

Of course, there were negative forecasts as well. Many rightly fear the ability of computers to learn. There is an opinion that such a computer can cease to obey man, and then scenes from numerous Hollywood films, where artificial intelligence begins a war with humanity, await us. Also, some fear that such a powerful tool will fall into the wrong hands. However, any significant technological breakthrough in the history of human civilization is associated with contradictions in society. Most people are afraid of the new. At the same time, sane people realize that development is impossible without changes.

One way or another, the emergence of KK seems to be inevitable. So we can only wait and hope that this technology will allow humanity to move to a completely different level of life.