The concept of PC will be replaced by QC

Will PC soon become "antique"?Photo: Telegraph .

Quantum computers (QC - quantum computer) are systems that can perform a multitude of complex calculations at the same time that a normal PC takes millions of years.

Physical experts define QC as microcomputer capable of handling big problems. Over the past 30 years, they dream of the prospect of people exploiting atomic potential to produce computers with power far beyond today's silicon technology.

So far, quantum computers are still paper projects and many scientists suspect they can find a way to make it a reality. However, pioneers in this technology began to believe that QC will appear at home like a PC in less than 20 years.

" A few years ago, I said quantum computing would have very little chance of being applied to everyday needs ," said Professor Anton Zeilinger, a quantum specialist at the University of Vienna (Austria). " But now I am much more optimistic when I see great strides in this field and I believe QC will soon be used similarly to current desktop systems ."

In the quantum world, a molecule can be in two positions or two states at the same time. The traditional PC processes information in the form of binary numbers 0 and 1, and is memorized by the on-off position of super small switches, or bits, in the circuit board.

In quantum computers, atoms and subatomites act as switches to remember and process tasks. Each of these switches can be simultaneously on "on" and "off" states, so that "qubit" basic components (quantum bits) are able to participate in several stages and do not need to be done step by step. like normal computers. Researchers estimate a simple QC, with only 30 qubits, also reaches 1,000 times faster than today's most powerful PC.

At that speed, the information does not need to be classified in a certain order in the database. " PC works like you look up your phone book. If you know the name of the caller, you will easily find their contact number. Conversely, if there are only numbers, you must search each line to find the owner And the quantum computer will browse unpublished data in a flash , "Zeilinger compares.

Recently, scientists have found a way to separate quantum into two phases (phase), accordingly, the method of building QC also completely changed. " I used to predict that people needed a few decades to complete a quantum computer, but with new technology, time would be counted in years, " said Professor David Deutsch of the University of Oxford.

However, scientists also began to worry about security in the era of quantum computing. The ability to analyze a series of complex synchronous command sequences will help hackers to unlock solidly encrypted systems.

- PC can handle 64 bits of data at a time, while 64 qubit QC works 18 billion times faster.

- QC can solve in a matter of seconds the problems that today's most powerful supercomputers take for millions of years.

- PC takes thousands of years to unlock the "super encryption" technology that some high-tech firms are deploying, and QC can complete that decoding process in a matter of hours.