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Published online 15 February 2007 | Nature | doi:10.1038/news070212-8
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Quantum computing at 16 qubits
Programmable computer solves sudoku and sets seating charts.
A Canadian firm has built what it claims is the first fully functional quantum computer and has used it to solve a number of simple problems.
But some researchers argue that the computer isn't powerful enough to beat conventional machines, and question whether it can be scaled up to a useful size.
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