The performance of
D-Wave, which was the topic of the world's first quantum computer, is not so
different from ordinary computers. Some even say that D-Wave is not a proper
quantum computer. In fact, D-Wave didn't do much for the title of the first
quantum computer. While quantum computers solve NP problems easily, the story
of when proper algorithms have been applied, D-Wave, has so far been sold only
to Lockheed Martin, NASA, and Google, and hasn't shown any special performance.
It may still take some time to play the role of tumbling expectations, and many
media have reported since 2013 that quantum computers will be used at a
practical level. In the last two years, public information on quantum computers
has also increased significantly.quantum computers will be used at a practical level. In the last two
years, public information on quantum computers has also increased significantly.
Will quantum computers be realized sooner or later as media and people
expect? Most experts agree that it's a long way off. That would be quite
different from what people expect. At the current level of technology, quantum
computers will not be able to play games, put business programs, or even
popular operating systems like Windows or Linux. This is because the quantum
computers that are currently being studied are computers that can be used for a
limited purpose.
For example, suppose a quantum computer uses the spin of
electrons as qubits. The electron before starting the operation has both +1/2
and -1/2, the values of the spin the electron can have in a quantum computer.
This is roughly described as follows. Think of it as a white ball for a
question or a black ball for a question.
