Quantum computing has been a Holy Grail in research since Nobel Prize physicist Richard Feynman challenged scientists in 1981 to build computers based on quantum mechanics, which predict that matter can be in multiple states at once, in contrast to the on-off transistors that have been the foundation of computing since the 1940s.
For decades, the work was all theoretical. But now scientists at IBM Research in Yorktown Heights, N.Y., believe they're on the cusp of building systems that will redefine computing.
A real quantum computer, which could work on millions of computations at once, could be built in the next decade.
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