What can Quantum Computers Do? When can They be Expected?

Google introduced a quantum computer that solves a specific mathematical problem much faster than the world's most powerful supercomputer. This milestone calls for neither concern nor euphoria.

RIO DE JANEIRO, BRAZIL - In the 1980s, physicist Richard Feynman thought about the advantages of simulating nature with a quantum computer instead of a conventional computer. He thus initiated a process that is beginning to yield results almost 40 years later.

This week Google announced that one of their quantum computers is far superior to the world's fastest supercomputer. The comparison is not entirely fair, since a specific issue tailored to the way a quantum computer works was selected for the power test.

Nevertheless, the announcement has attracted a great deal of attention worldwide and has raised concerns that . . .

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