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Microsoft quantum computing claim still lacks evidence
Some attendees of a packed presentation were curious about the prospect of the first ‘topological’ qubits, but left with questions unanswered.
A Microsoft researcher today presented results behind the company’s controversial claim last month to have created the first ‘topological’ qubits — a long-sought goal of quantum computing. Two weeks later, physicist Henry Legg of the University of St Andrews, UK, cast further doubt on Microsoft’s claim when he posted a report on the preprint server arXiv, ahead of peer review, that pokes holes in a test that the company uses to verify its quantum-computing devices 2. Meanwhile, in today’s talk, Nayak displayed a schematic for Microsoft’s qubits: they are microscopic, H-shaped aluminium wires on top of indium arsenide, which is a superconductor at ultracold temperatures.
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