Microsoft said it had succeeded in harnessing a new state of matter to create the basic building blocks of a quantum computer, capping a 20-year struggle on the frontiers of physics that many in the quantum world had dismissed as unworkable.
The US technology giant said it believed the development would enable it to build a practical quantum computer by the end of the decade and eventually leapfrog others in the field.
The claim adds a new twist to the race to create a new form of advanced computing that has drawn in some of the biggest US tech companies and become central to the struggle for tech leadership between the US and China.
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