New technology 1

Nowadays, the technology in the area of computes is developing. In many technologies, a most hot new technology is a quantum computer now. And many companies, in particular small and medium-sized enterprises, pay attention to “cloud computing.” At first, I show a quantum computer to you.

A quantum computer is a new generation computer which realizes parallelism using quantum mechanical superposition. An electronic computer has number of 0 or 1 by a bit, but quantum computer can maintain optional rate of 0 and 1 by a bit thanks to quantum bit. If there is a quantum computer has n-quantum bit, it can calculate 2^n states. And if will realize a quantum computer has thousands quantum bit, it can calculate the problem for tens seconds which the modern fastest super computer cannot solve for thousands years. However, the quantum computer is superior to the modern computer in all the points. While the modern computer is general-purpose computer which can perform any calculations, researchers think that the quantum computer is the special-purpose computer which processes a specific algorithm at high speed.

The history of quantum computer

In 1980s

In 1980s, Paul Benioff proved that quantum computer can calculate without consuming energy in a quantum system. In 1982, Richard Phillips Feynman (U.S., Physicist) guessed also that quantum calculation is exponentially efective for classic calculation. In 1985, David Deutsch (U.K., Physicist) defined quantum turing machine which is origin of quantum calculating machine, and designed quantum circuit in 1989.

In 1990s

David Deutsch and Richard Jozsa thought up “Deutsch-Jozsa algorithm” in 1992. In the next year, Umesh Vazirani and Ethan Bernstein who is his student thought up omnipotent quantum turing machine and quantum fourier transform algorithm. In 1994, Peter Shor (U.S., Computer scientist) designed practical algorithm, “Shor algorithm.” Shor algorithm promoted research of quantum computer. It is based on quantum fourier transform algorithm and Simon’s research. Shor algorithm, which is an algorithm peculiar to a quantum computing machine, can perform the factorization in very short time which cannot be solved in realistic time by a classic computer. Since if practical quantum computing machine is realized, the safety of RSA code using the difficulty of factorization into prime factors will collapse. In 1998, QCL (Quantum Computation Language) which is the programming language for quantum computer was announced.

In 2000s

The quantum computer’s hardware development had big progress. In 2008, David Jeffrey Wineland (U.K., expert in ion trap) proved that each ion iced by laser can be caught. And research of the ion trap type quantum computer which manipulate each ion in quantum entanglement state progressed.

The quantum computer is investigated in the world now. If the practical quantum computer is realized, many problems will be solved and many researches will be progressed. I want to see it until I pass away.