Some big technology companies and startups have found their progress on quantum computing remains in the early stages despite years of substantial investment.
In October, researchers at Google said the company's quantum computer solved a mathematical operation in just three minutes 20 seconds that would have taken a supercomputer more than 10,000 years to complete. Google claims "we are only one creative algorithm away from valuable near-term applications."
Meanwhile, Microsoft restructured its project to build a working quantum computer in 2018 after missing internal deadlines, and Intel has indicated it could take several years to produce a quantum computer that is better than today's digital counterparts.
Moreover, IBM researchers put a damper on Google's claim of "quantum supremacy" by determining that a classical computer could more accurately simulate the same task in 2.5 days.
From The Wall Street Journal
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