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Simultaneous control of several silicon spin qubits at about 99.9% accuracy addresses a key scaling bottleneck, since accuracy typically degrades as more qubits are driven at once. The result is a five-qubit demonstration on a shared microwave line, not a full-scale processor, so the practical gains will depend on whether the error-reduction approach holds as arrays grow. For quantum readers, the main takeaway is that silicon's compatibility with existing chip fabrication remains a credible path to larger devices.
Scientists overcome a hidden obstacle to more powerful quantum computers
Scientists have discovered a way to operate multiple silicon qubits simultaneously with remarkable accuracy, overcoming a major challenge in scaling up quantum computers. Their new technique maintained accuracy of approximately 99.9% even when all five qubits were running at once, opening the door to larger and more powerful quantum processors.
Silicon spin qubits could play a major role in the future of quantum computing because they can be produced using the same semiconductor manufacturing methods that make today's computer chips. However, researchers have faced a significant challenge. When multiple silicon qubits are controlled at the same time, their operations tend to become less accurate. Building practical, large quantum computers will require scientists to control many qubits simultaneously while keeping errors to a minimum. Researchers at the RIKEN Center for Emergent Matter Science and their collaborators have…
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