Fundamental building blocks for fault-tolerant quantum computing demonstrated. For quantum computers to be useful in practice, errors must be detected and corrected. At the University of Innsbruck, Austria, a team of experimental physicists has now implemented a universal set of computational operations on fault-tolerant quantum bits for the first time, demonstrating how an algorithm can be programmed on a quantum computer so that errors do not spoil the result.
In modern computers errors during processing and storage of information have become a rarity due to high-quality fabrication...
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